18
Torque Specifications and Repair Tools
Torque
Item
Thread
Tool Size
in - lbs
ft - lbs
N - m
Bearing cover
screws (front)
M6
M4 Allen
48
4.00
5.20
Head cover
screws (side)
M6
M5 Allen
102
8.50
11.05
Inlet valve nut
M6
M10 Hex
25
2.08
2.70
Drain plug
1/8” - 27 NPT
M13 Hex
“Water tight seal”
–
–
Torque valves (in-lbs) and sequences are
referenced in each section as it applies.
This chart provides the same values, but
also expands to “ft-lbs” and “Nm”, as well as
supplies thread sizes and tools required.
Check
Daily
Weekly
600 Hours
1000 Hours
Water leaks
x
Plumbing
x
Seal change
x
Inlet valve change
x
Discharge valve change
x
Brushes (8136 Motor)
x
Preventative Maintenance
Periodic maintenance and adjustment
is necessary to keep the pump in good
operating condition. Perform the service
and inspection scheduled in the table.
Use only genuine Cat Pumps parts or kits
when performing repairs.
Troubleshooting
The troubleshooting table has been
provided to assist in defining problems
that may arise, then giving probable causes
to look for and finally providing possible
solutions to the problem at hand.
Problem:
Probable Causes:
Solutions:
Low pressure
Worn nozzle
Replace with proper size
nozzle
Worn seals
Install new seal kit. Increase
frequency of service
Air leak in inlet plumbing
Tighten fittings and hoses.
Use PTFE liquid or tape
Worn or dirty inlet/
discharge valve
Clean inlet/discharge valves
or install new valve kit.
Water leak at head cover
Worn or pinched o-ring
on head cover.
Install new seal kit. Increase
frequency of service.
Water leak at bearing cover
Worn or pinched o-ring
on bearing cover
Install new seal kit. Increase
frequency of service
Premature seal failure
Running dry, scored
plungers, abrasives,
contamination
Replace seals
Scored plunger
Abrasives, contamination
Replace plunger
Motor stalls or will not start
Brushes worn
Replace with Brush Repair Kit
