Specifications
Page Number - 4
CENTRO-MATIC
®
PUMP, MODELS 85471, 85472 & 85473
Form 404064
4. Unscrew the low level indicator (3) from the follower
plate (34).
5. Now remove the entire follower assembly from the pump
tube. After removing the follower assembly from the pump
tube wipe off the excess grease which will allow clean
access to the eight bolts that must be removed.
6. Loosen and remove the eight nuts (53) on top of the
follower.
7. Remove the follower weight and the wiper (51).
Replace the wiper with a new one.
8. Reassemble in the reverse of the above procedure
making sure that the long bolts are staggered with the
small ones and that they extend below the follower.
Low Level Indicator (see Figure 4 & 5 Page 6)
If the indicator pin appears to drop prematurely or water is
noticeable on top of the follower then the indicator seal (1) may
be damaged.
1. Remove the eight bolts (10) and lock washers (9) which
hold the cover on to the reservoir.
2. Inspect the reservoir gasket seal (39) for damage.
If damage is apparent then replace the gasket seal.
3. Remove the entire pump, vent valve and follower assembly
from the reservoir.
4. Remove the retaining ring (82) from the indicator rod
assembly (3).
5. Hold the indicator plug (4) with a wrench while removing
the indicator nut (2).
6. Remove and replace the O-ring (1).
7. Reassemble in the reverse of the above procedure.
Torque the indicator nut (2) to 20 ft.-lbs.
Safety Unloader Valve
(See Item 28, Page 7)
Safety unloader valve (28) is not serviceable and should be
replaced if malfunction is apparent. Upon reassembly, tighten
to 10 ft-lbs. (13.5 N-M).
The safety unloader (28) is set to open at 3,750 to 4,250 PSI
lubricant pressure. If Pressure Switch fails to operate, the
Safety Unloader will open at approximately 4,000 PSI to relieve
lubricant supply line pressure (Safety Unloader is preset and
cannot be adjusted.)
Do not plug the outlet of the safety unloader. Plugging the
safety unloader outlet could result in pump damage and
serious personal injury.
Bare Pump Assembly (See Lower Right hand
View, Page 7)
Please refer to the Operation Manual (C8, Page 298 series) for
the bare pump assembly (37).