Maintenance
Ampco Pumps Company
Page 25
Ampco Pumps Company ZP3 Manual M-004 Rev A 10.15
Gear Case Maintenance
WARNING:
Before servicing pump or motor, DISCONNECT the energy
source to the pump. This will prevent accidental start-up and serious injury.
CAUTION: SHUT OFF
product supply to the pump and drain the pump
before disconnecting piping and disassembly.
Disassembly
1)
Remove the pump head as described on page 16 (Pump Disassembly). Remove the
bottom oil plug and drain the oil from the gear case (remove oil fill plug for faster drain).
Remove the six hex head cap screws and washers from the gear case cover and slide the
cover off the drive shaft (Figure 44). If the cover is stuck, use a soft mallet to tap around the
edges until it breaks free. Using a straight edge remove the liquid gasket used to seal the
cover to the gear case. Remove and discard the oil seal from the cover using an arbor press.
Figure 44: Gear Case Disassembly (Gear Case Cover)
2)
Using a hammer and a punch, bend the tabs straight on the lock washers (Figure 45). Use
a wedge (wood or plastic) to keep the shafts from turning while removing the lock nuts (Figure
46). Using a spanner wrench or the nut removal tool (available from Ampco), remove the gear
lock nuts. Slowly remove the gears from the shafts. Remove the gear keys and gear spacers
from the shafts.
Part
A
Oil Seal
B
Cap Screws and Washers
C
Gear Case Cover
D
Oil Plug (Fill)
E
Oil Plug (Drain)
F
Sight Glass
A
D
F
E
C
B
Figure 45: Bending Tabs on Lock
Washers
Figure 46: Removing Lock
Washers
Wedge
