BLACKMER HD942A, Installation, Operation And Maintenance Instructions

Page: 24 / 28

OIL PUMP REPLACEMENT
CB9A-030 page 24/28
Figure 22 – Oil Pump
1. Remove the oil pump cover bolts and oil pump
cover.
2. Remove the oil pump assembly, drive cone and
spring.
3. Clean and inspect parts for wear or damage,
replace as necessary.
4. Place the spring and the drive cone in the end of
the crankshaft.
5. Note the slot in the end of the crankshaft and the
drive tab on the back of the oil pump assembly.
Install the oil pump assembly into the bearing
carrier with the tab and slot aligned.
6. Note the groove around outer edge of the oil pump
assembly and the stop pin in the oil pump cover.
Position the oil pump cover and new gasket with
the pin in the oil pump groove, rotating the oil pump
as needed. The bolt hole positions ensure proper
orientation of the oil pump cover.
7. BY HAND, tighten the oil pump cover bolts while
the pump cover is held flush with the bearing
carrier.
NOTICE: If by hand tightening, the oil pump
cover cannot be drawn flush with the bearing
carrier, the drive tab or the stop pin are
improperly aligned. DO NOT WRENCH
TIGHTEN OR THE OIL PUMP WILL BE
DAMAGED.
8. Once the oil pump cover is secured by hand, the
bolts may be evenly tightened per Table 7 - "Bolt
Torque."
EXTENDED STORAGE PROCEDURES
If a compressor is not to be put into service for some
time, or if a compressor is to be taken out of service for
an extended period, care must be taken to protect the
compressor. The following steps must be taken for both
bare compressors and those already piped into a
system.
If proper storage procedures are not followed,
damage to the compressor may occur. Complete
compressor disassembly and replacement of rod
packing, bearings and other parts may be required.
1. Keep a written record storage procedures
performed – preferably on the unit itself.
2. Fill the crankcase with rust inhibiting oil. (New
compressors leave the factory without oil.) Squirt
oil on the piston rods and crossheads through the
nameplate opening. Loosen the V-belts to relieve
the load on the bearings. Rotate the compressor by
hand a few times to distribute the oil.
3. Plug all openings and purge the compressor with
an inert gas such as nitrogen or dry air at about 50
psig (3.5 bar-g). This may be done at the factory if
requested. Leave the compressor pressurized to
prevent air or moisture from entering the unit.
Check the unit monthly and add additional purge
gas as needed.
NOTICE: Tag the unit with a warning that it is
pressurized.
4. If a purge gas is not available, fog oil into the
compressor suction while rotating the unit. Then
plug all openings to keep out moisture, insects, etc.
5. Turn the flywheel by hand a few revolutions
once a month to distribute the oil.
6. Store the unit under a plastic wrap on its wooden
shipping base up off the ground. If the unit was
boxed for export shipment, leave it in its box. An
indoor or covered storage area is preferable.
7. Placing the Compressor back in service.
When the compressor is to be put in service, vent
the remaining purge gas and change the crankcase
oil. Follow the "Pre-Startup Checklist" and "Startup
Procedure" sections in this manual.
Figure 23 – Pressurized Compressor Tag
•
Compressor is pressurized with inert gas.
CAREFULLY bleed off gas BEFORE
attempting any service.
Hazardous pressure can
cause property damage,
serious personal injury
or death.