8
9, 10
49
50
Fig. 6
Fig. 5
Float switch (
8
)
Table 1
Model 85858 troubleshooting
Condition
Possible cause
Corrective action
Pump does not operate.
No electrical power to pump.
Turn on or connect 24 V DC power.
Motor relay failure.
Replace relay.
Motor overheated.
Turn power off for 10 minutes and restart.
Motor tripped out on locked rotor protection
Remove high pressure or repair cause of locked pump.
Broken gearset or shaft.
Repair gearbox.
Blown fuse.
Replace fuse, check for cause of overload.
Pump motor polarity is reversed.
Check to see if red motor lead is wired to the positive side of
the circuit.
Pump runs excessively.
Pump tube malfunction.
Refer to pump service page
404517.
Outlet check damage or contamination.
Repair check or remove contamination.
Vent valve damage or contamination.
Repair vent valve or remove contamination.
System component leaking.
Repair leaks.
Injector bypassing.
Repair injectors.
Pump speeds up or runs erratically.
Low level of grease or reservoir is empty.
Reill reservoir.
Follower plate is stuck and separated from grease.
Check follower plate and container for damage.
Pump piston or checks are worn.
Refer to pump service page
404517
.
Pump runs, but output is low.
Motor speed control set too low.
Refer to pump service page
404517
.
Faulty inlet or discharge check valve in pump.
Refer to pump service page
404517
.
Lubricant leaking from safety.
Pressure of system set too high.
Adjust pressure switch setting.
unloader valve.
Safety unloader damaged or contaminated.
Replace safety unloader.
Unable to ill reservoir.
Reservoir is full which closes the shut-off valve.
After some grease has been used, retry.
Fill line pressure is too high.
Relieve pressure at the relief valve
Shut-off valve does not close.
Contamination in the shut-off valve.
Remove the top block, spring and plunger and
remove contamination
33
A
54
75
96
117
138
159
180
201
222
243
B
3
4
1
2
Fig. 2 key
Deinition
1
Level gage
2
Level gage
3
N/O contact
4
N/O contact
A
Full
B
Empty
Float switch
Float switch (
8
) 277654 consists of a nor-
mally open dry-contact switch at top and a
series of reed switches below.
Dry contact switch controls a ‘full’ indica-
tor light or alarm. Reed switches control a
level gauge displaying reservoir level in 10%
increments. Refer to
ig. 3
,
page 5
.
Refer to
Float switch
service manual
404394
for more information.
6
