Allen wrenches: 5 mm
Open end wrench: 10 mm
Soft hammer: med. size, plastic or rubber
Gear puller - push-pull type
Motor shaft support tool (see Fig. 13)
Socket set with 10 mm socket
Feeler blades: .06 mm, .07 mm, .09 mm
Emery cloth: 180 grit
Flat honing stone
Cleaning agent: acetone or similar
4.2
Plastic Filter Cover and Filter Housing
Remove the plastic cover (Ref. 70) by removing the two
socket head cap screws (Ref. 72) and rubber feet (Ref.
71).
Remove the three hex head bolts and copper washers
(Ref. 28/29) and pull the filter housing (Ref. 24) off the
pump.
Pry the filter housing gasket (Ref. 22) from the opposite
motor side endplate (Ref. 18) and discard the gasket.
4.3
Endplate, Opposite Motor Side
Use an Allen wrench to unscrew the four socket head
cap screws (Ref. 19) retaining the endplate (Ref. 18).
Set the endplate aside (see Fig. 7).
4.4
Vanes
At this point, the vanes and rotor are exposed for
inspection. The vanes can be slid in or out of the rotor
slots as required (see Fig. 8). If the maintenance task
can be completed without further disassembly, proceed
with Steps 7.4, 7.5 and 7.6 of the ASSEMBLY section.
Refer to Section 3.3 when inspecting the vanes for
wear.
4.5
Motor Cover, Plastic
Remove the lift ring nut (Ref. 42) and stud (Ref. 45) or
the shoulder bolt (Ref. 42) from the top of the pump.
Pull the rubber grommet (Ref. 43) and sleeve (Ref. 44)
from the plastic cover (Ref. 40).
Roll the pump over on its side, exposing the bottom of
the base plate (Ref. 48). Remove the four Phillips head
screws (Ref. 50) securing the cooling air housing to the
base plate (see Fig. 9). Slide the cooling air housing off
the pump and motor. In some cases, it is necessary to
remove the electrical junction box cover before sliding
the cooling air housing off.
Note:
Do not pull the rotor or allow the cylinder to
move unless it is necessary, as the rotor clearance is
factory set and requires additional operations to reset
the clearances during reassembly.
4.6
Cylinder
Remove two socket head cap screws (Ref. 15) and
lockwashers (Ref. 16) (see Fig. 10). Grasp the cylinder
(Ref. 14) to prevent it from falling, and set it aside.
4
Fig. 7 - Endplate Opposite Motor Side
Fig. 8 - Inspecting the Vanes
Fig. 9 - Removing the Cooling Air Housing
