Electrostatic discharge (ESD) potential could cause
damage to electronic pressure control. Use SprayTECH
ESD wrist strap P/N 0507958 or equivalent when working
on electronic pressure control.
5. Using a Phillips screwdriver, remove the four screws that
secure the EPC assembly to the EPC housing. Carefully
remove the EPC assembly from the housing.
6. Locate the two clutch field wires that pass from the gear
housing into the EPC housing through a grommet in the
back of the EPC housing. Remember the wire connection
terminals on the EPC assembly (label if necessary) and
disconnect the wires. Gently move the EPC assembly
away from the housing and rest it on the work surface by
the control housing.
7. Locate the four pairs of set screws that secure the clutch
field to the gear housing. They are located on the exterior
of the gear housing at the 12, 3, 6, and 9 o’clock positions
while facing the clutch field end of the gear housing.
Using an 1/8” hex wrench, remove the setscrews.
Remember the location of the two clutch field wires with
respect to the grommet and EPC housing.
8. Carefully slide the clutch field out of the gear housing,
keeping the field square to the gear housing so it does not
bind.
9. Using a Phillips screwdriver, remove the four front cover
screws. Remove the front cover.
10. Using a 11/16” open-end wrench, loosen and remove the
fluid hose from the fitting on the back of the fluid section.
11. Using a 1/4” hex wrench,.remove the four socket screws
that secure the pump housing to the gear housing.
12. Slide the pump housing away from the gear housing.
13. Remove and clean the housing gasket. Replace if
damaged.
14. Locate the drive shaft pinion that is protruding from the
front side of the gear housing. Remove the small snap
ring that is located on the drive shaft hub in front of the
ball bearing that is supporting the drive shaft.
15. From the opposite side of the gear housing (clutch side)
slide the drive shaft assembly out of the gear housing.
16. Inspect the grease seal located inside the bore from which
the drive shaft was removed. Replace if worn or
damaged. To remove the grease seal, use a flat blade
screwdriver to carefully pry the seal from the bore.
17. Clean the inside of the gear housing.
NOTE: To remove the drive shaft assembly, the pump
housing first must be removed from the gear
housing.
Clutch Rotor Socket Screw
Drive Shaft Assembly
Pointed Set
Screw
Set Screw
Clutch Field
Assembly
Lock
Washer
Clutch
Rotor
Clutch Field
Wires
EPC Assembly
EPC Assembly Screw
WARNING
Installing the Clutch Rotor Assembly, Clutch
Field and Drive Shaft Assembly
1. If the drive shaft grease seal was removed, press a new
seal into the bore from which the old seal was removed.
2. From the clutch side of the gear housing, insert the drive
shaft assembly into the bore, through the grease seal, and
through the ball bearing on the gear side of the gear
housing.
3. From the gear side of the gear housing, insert the snap
ring into the groove on the drive shaft hub in front of the
ball bearing.
4. Place the housing gasket over the gear housing dowel pins.
5. Carefully place the pump housing assembly in front of the
gear housing assembly, lining up the gear housing dowel
pins with their corresponding holes in the pump housing.
Slide the pump housing onto the gear housing until there
is no gap between the housings and gasket.
Do not force the pump housing and gear housing together.
6. Locate the four socket screws and lock washers that secure
the pump housing to the gear housing. The longer screws
(2.25”) are fastened into the top internal holes. The shorter
screws (2”) are fastened into the bottom external bosses.
7. Using a 1/4” hex wrench, snug and tighten the socket
screws in a crossing pattern. Torque to 200–230 in./lbs.
8. Line up the four holes around the outside of the clutch
field with the four set screw holes in the gear housing.
The clutch field wires should be at approximately the 1 or
2 o’clock position.
9. Route the two clutch field wires through the grommet and
into the EPC housing.
10. Carefully slide the clutch field into its bore in the gear
housing until it “bottoms out” within the housing. Do not
pinch the clutch field wires during installation.
11. Thread one of the pointed set screws into its hole. Using
an 1/8” hex wrench, rotate the screw slowly until it
contacts the clutch field.
Do not tighten the set screw
.
The tip of the set screw should mate with the drill point
hole in the field. Check the clutch field for rotation. If it
rotates within its bore, the set screw is not seated within
the drill point.
12. When the set screw is properly seated, install the remaining
three pointed set screws.
Do not tighten the set screws.
13. Using a crossing pattern, tighten each of the pointed
setscrews until they are snug. Once all four pointed set
screws are snug, use a crossing pattern to tighten and
torque the set screws to 60–70 in./lbs.
It is very important to evenly snug, tighten, and torque the
clutch field pointed set screws in a crossing pattern. This
ensures the clutch field will stay centered in the gear
housing.
CAUTION
CAUTION
Grease Seal
Bearing
Snap Ring
Small Snap Ring
Front Cover
Pump Housing Socket Screw
Front Cover Screw
Plug
Housing Gasket
© SprayTECH. All rights reserved.
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