Gasmizer Manual - Submarine Manufacturing and Products Ltd
Gasmizer Manual - Submarine Manufacturing and Products Ltd
Gasmizer Manual - Submarine Manufacturing and Products Ltd
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March 2009<br />
Disassembly:<br />
(Having disassembled down to removal of the crosshead <strong>and</strong> wiper packing assembly)<br />
1. Remove drain plug <strong>and</strong> drain oil from the crankcase.<br />
2. Disconnect pipework to unloaders <strong>and</strong> remove unloader manifold complete with<br />
unloaders.<br />
3. Remove crankcase side covers.<br />
4. Remove the connecting rods.<br />
5. Measure <strong>and</strong> record the end float of the crankshaft.<br />
6. Disconnect oil suction pipe from end cover.<br />
7. Remove oil pump.<br />
8. Withdraw oil pump coupling.<br />
9. Loosen <strong>and</strong> remove the housing retaining nuts <strong>and</strong> withdraw the bearing housing.<br />
10. Remove the crankshaft key <strong>and</strong> withdraw the flywheel.<br />
11. Loosen <strong>and</strong> remove the drive end bearing housing nuts <strong>and</strong> withdraw the housing,<br />
taking care not to damage the oil seal.<br />
12. Unscrew the centre connection over the centre bearing.<br />
13. Insert a screwdriver <strong>and</strong> extract the centre bearing locking screw.<br />
14. Withdraw the crankshaft <strong>and</strong> centre bearing assembly supporting the crankshaft<br />
through the side access openings.<br />
15. If the main bearings are to be removed then remove the thrust washer, which is<br />
located in the outer main bearing housings by a dowel.<br />
16. Each housing contains two split complete shell bearings, which are pressed into<br />
the cast iron housing, then can either be pressed out or driven out with a suitable<br />
m<strong>and</strong>rel taking care not to damage the housing.<br />
17. Loosen <strong>and</strong> remove the bolts from the centre main bearing housing, split the<br />
housing <strong>and</strong> remove from the crankshaft.<br />
NOTE<br />
The top <strong>and</strong> bottom facings are stamped on one side only to ensure correct mating or reassembly.<br />
The bearing is split horizontally <strong>and</strong> a small lug on the bearing locates in the housing<br />
preventing rotation, each half bearing is lifted out by h<strong>and</strong>.<br />
18. Small end bearings are of the needle roller type pressed in. If removal is required<br />
press or drive out using a suitable m<strong>and</strong>rel taking care not to damage the connecting<br />
rod.<br />
Maintenance:<br />
Wear limits are:<br />
Crankshaft Main Bearings<br />
Main Bearings<br />
Maximum total Clearance being<br />
2.748” (69.79mm) MIN<br />
2.75” (69.85mm) MAX<br />
2.752” (69.90mm) MIN<br />
2.7555” (69.99mm) MAX<br />
0.009” (0.229mm)<br />
Chap 9 Page 117 of 168 OM002 Rev 5
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