Troubleshooting
Condition
Possible cause
Corrective action
Pump does not run.
Pump is seized or damaged.
Disassemble pump and repair any parts that are
damaged or worn.
Incorrectly wired.
Connect red motor lead to positive battery
terminal and black motor lead to negative
terminal.
Pump speeds up or runs erratically.
Low level of grease or reservoir is empty.
Fill reservoir.
Follower plate is stuck and separated
from grease.
Check follower plate and container for damage.
Pump piston or checks are worn.
Disassemble pump and repair.
Pump runs, but output is low.
Motor speed set to low.
Increase motor speed setting.
Faulty inlet check (
29
,
30
), faulty discharge
check (
23
,
24
) or damaged o-ring (
27
).
Replace faulty components.
Seepage from housing cover (
35
).
Cup seal (
16
) or o-ring (
14
) worn out.
Check seals and replace if necessary.
Pump is noisy.
Crankcase needs oil.
Fill with oil.
Pump does not build pressure.
Worn wrist pin bushing (
12
).
Check bushings and replace if necessary
Foreign material holding lower check open.
Dismantle and clear check.
Consider adding grease filter to system.
Motor runs, but no pump output.
Gear set or adapter shaft stripped or broken.
Dismantle and replace damaged part.
18
