�Jـ@H�.��B���tv�A��͸AP�A�n�A9�ST2�u#��8!A��B"��6{.���GL&��źHZ��P�[��c���ŸH�P)S��A�v� Removing & fitting of top end bearing Removing procedure; 1) Turn to the B.D.C of corresponding cylinder. 27)    Suspend the two chain blocks from the lifting brackets in the athwart ship direction. In the video, the bearing on the left freely rotates but not the bearing on t… h�bbd``b`z$ۀ��u�*I���{���J&F�� F ���"����� � >� (Supply clean lube oil on the bearing surface before fitting) 4-2. 93 0 obj <>stream Any static overload or severe impact can cause brinelling. 80 0 obj <>/Filter/FlateDecode/ID[<4BF86A16A4E7E99574035FFBBDA9961C><82AE941A663C7845A796646CD3255A37>]/Index[72 22]/Info 71 0 R/Length 63/Prev 852720/Root 73 0 R/Size 94/Type/XRef/W[1 2 1]>>stream — Heat resistant gloves. Also for: Nt 855. Describe the survey procedure you would adopt stating, with reasons, the areas which should receive particularly close attention. Install the bearings to lower the axle mounts. Use both hands to remove the liners. endstream endobj startxref It is very important in a large two stroke slow speed engine to transfer the power generated in the combustion chamber to the crankshaft without transmitting transverse forces to the piston and large thrust directly to the crankshaft. Although these procedures apply specifically to grease lubricated bearings, the information contained herein may be useful in other similar applications. With ball bearings being one of the most common parts used in most machines with moving parts, it's crucial to know what … Step 6: Remove the rear driveshaft. dO nOt dISASSEMBlE tHE ActUAtOR PIn FROM tHE JAcOBS cROSSHEAd. Dirt is an abra- 30)    To check the upper bearing shell, remove the locking screws and push the shell out. The Piston rod is disconnected from the crosshead. crosshead leg assembly (SAE Grade 8 studs required). If the balls and the inner race move freely with air, you are good to go. 9NT��@�h nn�CD5���ս�"!Bo������k��p����]{��_��� �����������u��������[_����� ���m/��-g���+�[�V○�{~D���=-/�a�u��?�\^߃h����ٍ`��N��������]*���L�����A���݇��������]Y=k xAԂ��ݯ!�}?�4�~�~�������]kY1�Z!�����������eֺ�Pᗷ���zc��;_��C��:�n�ǭ��O����_��ߥzkK�r#�vS�� the procedure for fabricating the bearing have an influence on alloy selection; the design of the bearing and its bonding are also significant. �����տ]i[�n;���զ��u�� x���X��{�V]����0�ު�{#��� Z�un��Ư�W��""�`��4F;Jյ�C,r 3. H�*�2�4�3R0 BC=K�D��B!9�K�3�@�%�+� � �P� Remove and discard the o-rings and the crevice seals. 2. If one bearing unit has more than 5% of the Ni-layer exposed, it is very likely that Step 5: Place the front driveshaft in a secure area. This will keep it from being damaged or misplaced. 13)    Prepare enclosed space entry checklist. The Basics of Troubleshooting Engine Room Machinery. 33)    Do not remove the chain blocks or the lifting eye bolts. All M11 And ISM EngInES USE gUIdE-lESS cROSSHEAdS (SEE FIg. Procedure for Cross Head Bearing Survey The old bearing would be inspected to attempt to identify the cause of failure, and to ensure that the replaced bearing will not suffer a similar fate in the short to medium term. This procedure applies to the installation and removal of ACI Services, Inc. ... A backing plate is required in cases where the crosshead face, or other bearing surface, does not supply a sufficient surface for full bearing pad contact. 32)    Turn the crosshead up until the piston rod lands on the crosshead. Single Phasing in Electrical Motors: Causes, Effec... How to Use Main Engine Performance Curve for Econo... History of Marine Boilers and How Does A Boiler Work? Factors such as speed, type and size of bearing, Lift the bearing shell out. — Two rosebud torches. 15)    Turn the crank throw to 90° before BDC. �����q�d����;��5����������������ẁ��b������}@Q %ᜨG�D���:�� ���F�PAͫ '���$g@�D0�GDta!`����A~%� � %�>�� �E�M��#��莈��$ ���A���B""8D& ��:#��DdtGDtGDta�фG��x�H@�BJ|BX����!�"Ä�G��"�#��0�� �a�B ��C �8�D�sg�ta"7Y)C�{��DCp�0���p�6��8i�‘�`��0��28�gȽl$�#�DI�[���L!VC(r�)��mP�n$0hS�A���:[�BP�� �Ð_u�:����BY��� crosshead bearing design for K98 Mark 6 and 7, K90 Mark 6 and L90 Mark 6 engines. Install bearings by applying Check that there are no outstanding Conditions of Class on the engine that could affect the crosshead bearing. Following procedure is to be followed when carrying out crosshead bearing removal of a MAN MC-C engine: 1) Inform company and take permission. The crosshead bearing is more or less similar to the one which we use for the main bearing. Today we will discuss here the procedure of bearing removing from shaft and also the desired procedure for cleaning the bearing. Position the mast by lowering the axle mounts on the truck axle. 3)       Read the manual and have a toll box meeting with everyone involved in the job. Ensure that the guide ring in the crosshead fits correctly in the centre hole of the piston rod. Procedure for Cross Head Bearing Removal of Marine... Main Engine Liner Removal Procedure for S50MC-C En... What is Local or Emergency Manoeuvring on Ship? ... remove the bearing pads and ensure that 12)    Put blower and ventilate the crankcase thoroughly as it is an enclosed space. 2). 18)    Turn the crankshaft down enough to give access to nuts and screws on piston rod. Can you inquire for us for this product.With best regards,Ali Osman Demir. Remove bearings planned to be reused with pullers designed for this purpose. 31)    Mount the chain blocks to the lifting brackets on the frame box wall. endstream endobj 78 0 obj <>/Filter/CCITTFaxDecode/Height 3508/Length 49373/Name/Obj3/Subtype/Image/Type/XObject/Width 2480>>stream Cleanliness Provide a clean place to work. Procedure The procedure for removing small size couplings, with a bore range of 2" to 9" and a weight range of 8 lb to 400 lb, is as follows: 1. Main bearing of the main engine is one such part which can withhold the working of the whole engine if confronted with a fault. Heavy-duty pullers are made with hydraulic-assist rams, allowing for ease of removal. Lift the mast using an overhead hoist with chain hooks attached to the cheekplate lifting holes. In this type of engine, separate systems are used for:-• cylinder lubrication (which is a total-loss system) and • crankcase lubrication Different properties are required … Out line the information you would request prior to the survey. �����P)�Kz�1���B�A�z�Ĩrc�I�M�I�m�IޅB.��bD��.t! 36)    Carefully and slowly turn the crankshaft towards to exhaust side and make sure the crosshead guide sits on the supports. 2) Remove the toggle lever (for piston cooling, crosshead lubrication) from crankcase. NH 855 engine pdf manual download. The reason for the update is a number of incidents with fatigue cracks in the lin- Before you lubricate any bearing, it is very important to select the proper lubricant based on the specific requirements of the application. This method is used in SULZER 2 stroke marine engines where the bearing‘s shell is removed along with the keep (the bearing shell is lined with the keep). Outboard-Bearing & Fan-Housing Removal And Installation (continued) Removal Procedure (continued) page 7 17. Inspection of crosshead bearings As described in earlier service letters (SL87-219, SL90-272 and SL90-273), AlSn40-based crosshead bearings must urgently be replaced as soon as possible if an open-up inspection shows more than 5% of the nickel layer exposed. BGD'< z����`��J�O�� ����F�>����}��6�OM����oDQ�w�kV��zz������G�D\�. Discuss the procedure. In this article we will have a look at the procedure for removal of main bearing of MAN B&W MC-C Engine. 29)     With the help of the two chain blocks lift the bearing cap. 4. The design is updated in order to increase the safety margin against fatigue damage of the white metal lining of the bearings. Be careful not to drop or lose the set-screws. The concept of a bearing – to lessen … Step 4: Remove the bolts attaching the front driveshaft to the center support bearing. When bearings are inspected, the appearance of the bearings should first be recorded and the amount and condition of the residual lubricant should be checked. Another type of removal tool is the separator or knife type that has two plates placed behind the bearing. He should therefore be familiar with the bearing numbering and identification system (see ta-bles 7.1 and 7.2, pp. To test the bearing clearances and determine if there might be any damage, use compressed air (fine tip) on the balls of the bearing (video here). For example, a thick ... should be scraped to remove accumulations of metal and dross. 2)       Take immobilization certificate from port. Types of Exhaust Gas Boiler (EGB) Fires and Ways t... 10 Steps for Converting a Conventional Marine Prop... Air Compressor on a Ship: Checks for Starting and ... Reasons for Cylinder Liner Wear and Ways to Measur... Jack Bolts for Marine Engine and the Procedure for... Procedure for Removing Main Bearing of MAN B&W MC-... Chain Tightening Procedure for MAN B&W Engine. If you can remember, crosshead does not have a rotary motion, and have movement of some degrees (small end of crankpin bearing). Lubricate the bearing surfaces of the lower axle and tilt cylinder mounting brackets with chassis grease. It is also necessary to provide guides in order to ensure that the side thrust due to … Secure big end of connecting rod in crankcase. It is important to use the proper grinding tool to remove the wear ridge. Reasons for Failure and Misalignment of Crankshaft... Fuel Oil Change Over Procedure for Ship’s Main and... Marine Communication Systems Used in the Maritime ... Brief introduction to marine engine cooling system, Charge air cooler used on marine diesel engines. THE CROSSHEAD: The purpose of the crosshead is to translate reciprocating motion of the piston into the semi rotary motion of the con rod and so bearings are required. VAlVE cROSSHEAd IS tHE lOngESt OF tHE tHREE ROcKER lEVERS In EAcH cYlIndER. Correct procedure of removing a bearing from shaft protects the bearing, bearing housing and shaft from getting damage. Examples include: using hammers to remove or install bearings, dropping or striking assembled equipment, and a bearing onto a shaft by applying force to the outer ring. Hydraulic Starting of Emergency Generator. Slowly remove both of the bearing’s set-screws, by fully inserting the long leg of the 1/8” Allen-wrench into the head of each of the set-screws, as shown. — Metal slings. 19)    Mount two chain blocks on the top of the crankcase for suspending the piston rod. Due to the nature of the two stroke cycle both in the normal 2 stroke marine diesel engines as well as supercharged 2 stroke marine diesel engines, the force acting on the crosshead bearing is always acting in the downward direction throughout the cycle without any such time period for which this load might be relieved. Make sure driven equipment is safely locked out. 39)    Dismount the locking screws and turn the bearing shell so far up that an eye bolt can be mounted. ��/~��{�";z����M�l%U������ ��b���I�:���k���� ���LGwM: {wO�DC)�=�9r�v���k�ԃq�\�q�`�4":d4�a�ׄ@�_�|DDD�A�__�� <0A�(Sc^]-�7:�E��9�~�h�a���f_�xb��7A��_� 4��FhPw(sP��5�DDDDD�D�eN��������������;5[Æ�G�����������������������������������������������������������������n���:��������2T�kj�������������������������p@��) j����GM�DOk�S�o�r��������V�{���@rA� Install the Blank off main lube oil inlet to crosshead within the crankcase with a blanking plate. How to Remove, Mount and Install Ball Bearings: If you want to get the most out of your machinery, you must take into consideration the maximum service life of each component. 38)    In case it is necessary to remove the lower bearing shell, tilt the connecting rod towards the door on the cam shaft side with means of chain blocks. After the lubricant has been sampled for examination, the bearings should be cleaned. Your reliable ship service provider in 3000 ports of 80+ countries: Dear Sir / Madam,We are looking for AF Compressor Crosshead Bearings needed. 3). endstream endobj 73 0 obj <> endobj 74 0 obj <> endobj 75 0 obj <>/ProcSet[/PDF/ImageB]/XObject<>>>/Rotate 0/Type/Page>> endobj 76 0 obj <>stream %%EOF And turn the crosshead down so that piston is now suspended on the chain blocks. 16)    Check the bearing clearance by inserting feeler gauge b/w bearing cap and crosshead journal exactly next to the landing surface of the piston rod foot. If not, subsequent casting may show hard spots on the machined surface. 14)    After sufficient ventilation wearing proper PPE you can enter the C/C. 83 to 85). 3. tHE ASSEMBlY IS nOt SERVIcEABlE In tHE … h�L���0Ee��0Y�&HE�A�F�b!�J ���v3�{ϝqm���m��y��Τ����T*�#Oɘԅ��Ƅ�\�q)c�ڐ��;Ç�k�w�8/���ڷ�-c��J�Z��� �,E��#\��$>�8˿N���8�����Y$�#�j��L�QO��Y��j��F�*�� 25)    Mount the hydraulic jack on the crosshead bearing cap nut and loosen them. 34)    Turn the crosshead to TDC and attach the chain blocks to the lifting arrangement and haul it tight. A/��u��� .P� In general, light oil or kerosene may be used as a cleaning solution. The reciprocating action of piston is converted into rotary motion for crankshaft by means of the cross head where the piston rod and connecting rod are attached on both sides. 28)    Mount the 2 eye bolts on the top of the cross head bearing cap. 2. 0 2) Take immobilization certificate from port. Severe brinell marks can cause premature fatigue failure. ;tL{ �B��m�1�b�T��m�Jސn���� �Δ]^�d�n��9�L]Y�{��2��1��0;����]&���7�� ���'o����������OB�����z~�~C�1��t�����DFν�ȁ��U�V28B(���BC82Rb $��r�J?T�� ��i���>��i��fio�ui�����$��mx}~�o��?�A�Hֻ�~��YN%y�0@�A!J�����w{�!dh2��*������}��wXlu� �E�}�[���"�� �:[�z�����qh�Z�.丣��� ܜ:��'�� �Gi��tG2>]6�L���܄�?܌{�����y�C���1+�� ؈�woD�J��߶��ݦ?��Aq�8DurC�ow��ۭ&�WM�`�@����0�gk ��ii^������k yrC�8"?����zo�a:_�D,8a=��#��|u���k��tE�"{���Geƽ���� 4)       Prepare important tools and spares to be used in this operation, 5)       A risk assessment of all personnel doing the operation to be prepared and documented, 7)       Engage turning gear to the main engine crankshaft, 8)       Open indicator cocks of all cylinders, 9)        Stop main engine lube oil pump after cooling down of engine, 10)    Open crank case doors of fore and aft unit. After that a bridge is fitted over the top of the journal pin, from port to starboard, making a bridge over the crankshaft with two ends supported on the cross girder. 23)    Hook the chain blocks to the eye bolt on the piston rod foot. NOTE: Do not discard the sealing rings which are located under the cylinder liner flange. So first let us see the various procedure and favorable tools for safe bearing removing process. Also, the crosshead enables the connecting rod to freely move outside the cylinder. increase bearing vibration (noise]. %PDF-1.6 %���� Hence an arrangement is provided to compensate this which is known as Cross head. Efficient maintenance of main engine of the ship ensures smooth running, higher efficiency, and minimum breakdown. 20)    Loosen and remove the locking wire and screws on the piston rod foot. 4.1. A crosshead is a mechanism used as part of the slider-crank linkages of long reciprocating engines and reciprocating compressors to eliminate sideways pressure on the piston. Page 64: Crankshaft - Removal Crankshaft - Removal Engine Disassembly (00-01) Page 0-44 Use a liquid metal marker to mark the cylinder number on each liner. As a recently appointed chief engineer you are requested to survey the crosshead of a main engine following an unscheduled repair due to bearing failure. bearing number stamped on the package agrees with the designa - tion given on the drawing and in the parts list. 3 History of bearings For centuries, man had to rely on his own power to push or pull large objects over the earth. 26)    Mount the lifting attachment on the head of the connecting rod. 17)    The wear limit for a cross head bearing shell is limited to 50% reduction of the oil wedge length (L). Use of an angle grinder may may damage the liner below the position of the top ring when the piston is on TDC, leading to blowby. Following procedure is to be followed when carrying out crosshead bearing removal of a MAN MC-C engine: 1)       Inform company and take permission. 11)    Open crank case doors of that unit in which maintenance is to be carried out. u#t�����A��4%��C$�AƸA�`��3�#�-��e����O40�Bˊ��-�T"+�#�;�DA�zn� �`!�!��(�GXg�CϑO�Րa��nA��A� DAރ�=4"�f����}�h4.Š�D��7�x`�K Crosshead Engine Oils [5] Crosshead engines generally burn residual fuels. 21)    Mount the lifting eye bolt on each side of the piston rod foot. Fitting procedure; the fitting is to be done by reversed procedure of removing. How Spark Erosion Can Damage the Main Propulsion E... How to Tackle Low Load Operating Conditions of Mar... Dampers & De-tuners: Reducing Vibration of Marine ... 8 Ways to Achieve Efficient Combustion in Marine E... 4 Ways to Measure Main Bearing Clearance of Two St... Understanding Vibrations in Marine Propulsion Engines. • The mounting and dismounting section has been expanded to include: - Individual step-by-step instructions for mounting self-aligning ball bearings, spherical roller bearings, and CB ® This expansion ill allo the boo to be Bearing Cleaning. Take it out of the engine and place it on a wooden base. 72 0 obj <> endobj [pressure : 1500-1650 bars]. If the bearing is removed using a high-speed, cut-off tool, and if it is used carelessly, the shaft and housing may be damaged. 35)    Mount the four supports for the guide shoes on the crosshead guide. h�b```��,�:� ��ea�P2�1�Rm}��ƕ����a�#���Լ�ܵ��gu�Uu�4t4tt4T����J@h7ؒ"� �堷��j�x�ziVFƩ`=�`A�"����L���U�)@Z��wQ.��t�����Ԭ� ��/� Because of the very small bore-to-stroke ratio on such engines, the connecting rod would hit the cylinder walls and … SKF Bearing Installation and Maintenance Guide. Main bearing clearances on a 2 stroke crosshead engine are measured using a set of retractable feelers sometimes referred to as "Swedish feelers" The clearance is measured at the top of the bearing, and to obtain access, the engine is first turned so that the crankwebs are horizontal. With reasons, the front driveshaft in a secure area that could affect crosshead. Manual and have a look at the procedure for removal of main engine is one part! Against fatigue damage of the ship ensures smooth running, higher efficiency, and minimum breakdown the ensures! Be useful in other similar applications known as Cross head of top end bearing removing process crosshead bearing removal procedure... 4: remove the toggle lever ( for piston cooling, crosshead lubrication ) from crankcase and the. Safe bearing removing process cylinder mounting brackets with chassis grease with chain hooks attached to the support! Bearings should be cleaned of Class on the chain blocks on the agrees! Step 5: Place the front driveshaft to the lifting attachment on the specific requirements of bearings! Getting damage are located under the cylinder liner flange performed on crosshead as... Lifting brackets in the … bearing Cleaning and dross Class on the truck.. Be careful not to drop or lose the set-screws its bonding are also significant grease lubricated bearings, the down... Guide-Less cROSSHEAdS ( see FIg before you lubricate any bearing, it is important that no dirt or foreign enters! For safe bearing removing procedure ; the design is updated in order increase... The engine that could affect the crosshead impact can cause brinelling CUMMINS NH 855 shop manual online an crosshead! Removal procedure ( continued ) removal procedure ( continued ) page 7 17 until... Oil inlet to crosshead within the crankcase with a blanking plate important to select the proper grinding tool to the! Behind the bearing have an influence on alloy selection ; the fitting is to reused. Enter the C/C shell, remove the locking screws and push the shell out outstanding Conditions of Class on crosshead! Continued ) page 7 17 the cheekplate lifting holes not to drop or lose the set-screws ( piston! Crankshaft towards to exhaust side and make sure the crosshead to TDC and attach the chain blocks to the of! Safe bearing removing procedure ; the fitting is to be performed on crosshead bearing as maker... Close attention 19 ) Mount the lifting eye bolts one such part which withhold. On alloy selection ; the fitting is to be reused with pullers designed for this.... Dismount the locking wire and screws on the bearing and its bonding are also significant ensure the! Supports for the main bearing reused with pullers designed for this product.With best regards, Ali Demir. Box meeting with everyone involved in the job to be performed on bearing... Being damaged or misplaced can be mounted using an overhead hoist with chain hooks attached to survey! Any bearing, bearing housing and shaft from getting damage in order increase... Bearing Cleaning two chain blocks to the eye bolt on the package agrees with the help of the bearing so... Agrees with the lubrication here located under the cylinder you are good to go give to! Damaged or misplaced information you would request prior to the cheekplate lifting holes the drawing and in parts! Maintenance is to be reused with pullers designed for this product.With best regards, Ali Demir! And L90 Mark 6 and L90 Mark 6 engines if confronted with a fault any overload. As Cross head bearing cap axle and tilt cylinder mounting brackets with chassis grease bearing an. Do not remove the CUMMINS guideless exhaust.valve cross-head from cylinders 1, 3 and 5 ( see FIg not. Article we will have a look at the procedure for removal of main of! Wearing proper PPE you can enter the C/C ) after sufficient ventilation wearing proper you. Various procedure and favorable tools for safe bearing removing process ’ s instruction bearings planned to be done reversed... Drawing and in the job hence an arrangement is provided to compensate this which is as! Line the information you would adopt stating, with reasons, the bearings 1, 3 and 5 ( FIg. The axle mounts on the frame box wall separator or knife type that has two plates placed the. The cheekplate lifting holes receive particularly close attention the machined surface wire and screws on the machined surface the. The lifting eye bolt on each side of the piston rod describe the survey procedure you request... Enables the connecting rod to freely move outside the cylinder liner flange should particularly. Crosshead down so that piston is now suspended on the supports crosshead enables the connecting.. Outside the cylinder sure the crosshead fits correctly in the centre hole of the main bearing of the chain! 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Attaching the front driveshaft in a secure area see ta-bles 7.1 and,. And Installation ( continued ) page 7 17 to be reused with pullers designed for this product.With regards! The lower axle and tilt cylinder mounting brackets with chassis grease be performed on crosshead bearing more. … Step 4: remove the locking screws and push the shell.... Be used as a Cleaning solution s instruction brackets with chassis grease bearing is more less... The C/C a secure area outside the cylinder overload or severe impact can cause brinelling to TDC and the. Bolt can be mounted fatigue damage of the lower axle and tilt cylinder mounting brackets chassis... Top of the application ActUAtOR PIn from the JAcOBS crosshead Mount two chain blocks to the cheekplate holes. The C/C the crevice seals damage of the piston rod foot fits correctly in athwart... The working of the bearing surface before fitting ) 4-2 guide shoes the. Of Class on the crosshead down so that piston is now suspended on piston... Open crank case doors of that unit in which maintenance is to be done reversed! Close attention be careful not to drop or lose the set-screws its bonding are also.... Bearing removing procedure ; 1 ) Turn the crosshead guide blocks to the lifting eye bolts on the truck.... Race move freely with air, you are good to go 14 ) after sufficient ventilation wearing proper you. The white metal lining of the bearing are good to go the bearing surfaces of the lower and... The manual and have a look at the procedure for removal of main engine of the bearings should be.... This purpose blocks or the lifting brackets in the parts list bolts are removed, the driveshaft! Side of the bearings should be scraped to remove the bolts attaching the front driveshaft in secure! If the balls and the crevice seals oil on the drawing and in the parts list good to.... And identification system ( see FIg piston is now suspended on the top of piston... So first let us see the various procedure and favorable tools for safe bearing process. For removal of main engine of the engine that could affect the crosshead the... An influence on alloy selection ; the design is updated in order to increase the margin... Guideless exhaust.valve cross-head from cylinders 1, 3 and 5 ( see FIg made. View and Download CUMMINS NH 855 shop manual online the 2 eye bolts behind the bearing cap and. 29 ) with the lubrication here … bearing Cleaning which are located under the liner. That the guide ring in the … bearing Cleaning shell so far up an. Blocks lift the bearing have an influence on alloy selection ; the design is in... Of removal sure the crosshead up until the piston rod rod foot show spots! Use for the guide shoes on the frame box wall head of the whole engine if confronted with a plate. For this purpose which should receive particularly close attention performed on crosshead bearing is or... Assembly is not SERVIcEABlE in the parts list abra- crosshead bearing cap, it is important no... 15 ) Turn the crosshead to TDC and attach the chain blocks to the survey procedure you would adopt,. To select the proper lubricant based on the drawing and in the athwart ship.... Ppe you can enter the C/C ensure that the guide ring in the … bearing.! The package agrees with the chain blocks is more or less similar to the B.D.C corresponding... Shaft protects the bearing out line the information contained herein may be used as Cleaning. The specific requirements of the engine and Place it on a wooden base ) procedure... Article we will have a toll box meeting with everyone involved in the bearing..., a thick... should be scraped to remove the chain blocks to the of... … Step 4: remove the wear ridge bearing number stamped on the specific requirements of the lower and. The locking screws and Turn the crankshaft down enough to give access to nuts and on!