MAINTENANCE /
REP
AIR
TROUBLESHOOTING
OPERA
TION
ASSEMBL
Y /
INST
ALLA
TION
SAFETY
/
SPECIFICA
TIONS
GETTING ST
ARTED
18-EN
REPAIR (CONTINUED)
Replace Motor Shaft Seal
1. Turn the pump OFF and disconnect from power.
2. Remove the gear coverplate, gears and drive key as described in
Gears and Drive Key Replacement instructions.
3. Remove the (3) 1/4-20 x 3/4 in. SEMS screws and motor from the
pump housing (see Figure 21).
4. Remove the motor shaft seal by prying out with a small screwdriver
(see Figure 22).
5. Lubricate the gear shaft with WD-40
®
or a similar penetrating oil.
6. Press a new motor shaft seal evenly in the pump housing until seated.
Lubricate the seal with a lightweight motor oil.
7. Gently slide the shaft through the seal until the motor is flush against
the pump housing.
8. Tighten the motor to the pump housing. Check for proper installation
by working a .0015 in. (.04 mm) feeler gauge around the motor flange
(see Figure 23). The gauge should not fit between the flange and
the housing.
9. Re-install the gears and drive key as described in Gears and Drive Key
Replacement instructions.
Figure 21
Figure 22
Shaft
Seal
Figure 23
