Gasmizer Manual - Submarine Manufacturing and Products Ltd

March 09
Oil Pump
1. Remove one screw on the inside face of the unit, this will enable the rotors and
body to be examined for damage and wear.
2. Repair by replacement of the complete unit.
Re-assembly:
1. Re-assemble oil bypass valve.
2. Lightly oil all bearing surfaces.
3. Replace centre main bearing shells and fit the housing to the crankshaft. Ensure
correct mating of marked facings. Replace fitted bolts. The torque setting is 45 ft-lb
(33Nm).
4. Place the crankshaft in position in the crankcase.
5. Replace the centre bearing locking screw making sure that it enters its location in
the centre bearing. Lock down firmly in its seating. Refit the centre connection. Fit the
bearing housing at the oil pump end with thrust washer correctly positioned and new
paper gasket fitted at the end face. Tighten nuts, torque setting is – 24 ft-lb (17.7Nm).
6. Replace the filter and plugs.
7. Fill the oil pump with lubricating oil and replace couplings.
8. Ensure that a serviceable gasket is available and fit the oil pump with the dive
correctly engaged. Replace and tighten bolts, torque setting is 10 ft-lb (7.4 Nm).
9. Reconnect Oil suction pipe.
10. With the thrust washer correctly positioned fit the drive end main bearing housing.
A paper gasket is used at the face joint. Tighten nuts, torque setting is – 24 ft-lb (17.7
Nm). Care must be taken not to damage sealing lip of oil seal.
11. Check crankshaft for freedom of rotation and also check that the maximum end
float measurement does not exceed the limit given in 9.9.7. (2)e.
12. Refit each connection rod, ensuring that each bearing shell is correctly fitted in its
half housing with lug engaged in the recess. Tighten bolts, torque setting is 30 ft –lb
(22Nm). Bend tab washers to lock nuts in position.
13. Check the rods for freedom of rotation on the crankshaft.
14. Replace the crankcase side covers and unloader assembly, using serviceable
gaskets.
15. Replace flywheel and refit key.
16. Ensure that the pulleys of the drive motor and the compression are in full
alignment. Fit the drive belts and adjust the belt tension as described in 9.5.4.
17. Refit the oil drain plug and refill crankcase with the correct grade of lubricating oil.
18. When complete booster is re-assembled re-set oil pressure, see 9.5.3.
9.10 Unloaders
Description:
The unloaders are the solenoid controlled gas operated type. Gas supply is from
booster outlet pressure reduced to 150 psi (10.3 bar) by a regulator. The solenoid is
controlled by a timer, (T2). This timer is used to set the interval between unloading (0-6
hrs) and the unloaded time (0-30 secs). The unloading interval should be modified as
required to ensure adequate moisture removal at the booster.
OM002 Rev 5 Page 118 of 168 Chap 9