201-D00 page 10/12
MAINTENANCE
12. Inspect the grease seal (104) for wear or damage and
replace as required. Grease the outside diameter of the
grease seal and push it into the bearing cover (27 or 27A)
with the lip of the seal inward. The lip will face outward
when the bearing cover is installed on the head
13. Attach a new bearing cover gasket (26) and the bearing
cover to the head. Install and torque the bearing cover
capscrews (28) to 15 lbs. ft (20 Nm).
14. Follow steps 14 and 15 to install the grease seal and
bearing cover (27 or 27A) on the opposite side of the
pump.
15. On 2 and 2.5-inch pump models, push the dirt shield
(123A) over the inboard shaft and firmly against the
bearing cover (27).
16. Attach the shaft protector (186) on the non-driven shaft
end.
Operation without shaft protector can
cause serious personal injury, major
property damage, or death.
Do not operate
without guard in
place.
18.
RELIEF VALVE ASSEMBLY
If the pump is equipped with a Blackmer air valve, refer to
setting and adjustment procedures in Blackmer Air Valve
Instructions and Parts List No. 201-G00.
a. Insert the valve (9) into the relief valve bore of the
cylinder with the fluted end inward.
b. Install the relief valve spring (8) and spring guide (7)
against the valve.
c. Attach a new relief valve gasket (10) and the valve
cover (4) on the cylinder.
d. Screw the relief valve adjusting screw (2) into the
valve cover until it makes contact with the spring guide
(7).
NOTICE:
The relief valve setting MUST be tested and adjusted
more precisely before putting the pump into service.
Refer to "Relief Valve Setting and Adjustment"
e. Install the relief valve cap (1) and gasket (88) after the
relief valve has been precisely adjusted.
TROUBLESHOOTING
NOTICE:
Maintenance shall be performed by qualified technicians only, following the
appropriate procedures and warnings as presented in this manual.
SYMPTOM PROBABLE
CAUSE
Pump Not Priming
1. Pump not wetted.
2. Worn
vanes.
3. Suction valve closed.
4. Air leaks in the suction line.
5. Strainer
clogged.
6. Suction line or valves clogged or too restrictive.
7. Broken drive train.
8. Pump
vapor-locked.
9. Pump speed too low for priming.
10. Relief valve partially open, worn or not seating properly.
11. Vanes installed incorrectly (see "Vane Replacement").
