English
English
14
© Titan Tool Inc. All rights reserved.
Removing the clutch Rotor, clutch Field, and Drive
Shaft Assembly
1. Follow steps 1–7 in “Removing/Replacing the Clutch Hub and
Armature Assembly.”
2. Locate the clutch rotor assembly on the end of the drive shaft
assembly. Note the locations of the three socket screws and
the two empty, threaded holes on the clutch rotor.
3. Using a 3/16” hex wrench, remove the three socket screws
and lock washers that secure the clutch rotor to the drive shaft
assembly.
4. Thread two of the socket screws into the empty, threaded
holes and tighten alternately. This will push the clutch rotor
away from the drive shaft assembly and pinion.
Electrostatic discharge (ESD) potential could cause
damage to electronic pressure control. use Titan 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 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. Remove the retaining ring in front of the ball bearing within
the center bore of the gear housing.
10. Follow steps 2–6 in the “Replacing the Gears” procedure to
remove the pump housing from the gear housing.
11. From the gear side of the gear housing, use a soft hammer to
tap the gear end of the drive shaft through the gear housing.
12. Carefully slide the drive shaft assembly out from the gear
housing, keeping the shaft square to the housing so it does
not bind.
13. Remove the o-ring from inside the center bore of the gear
housing from which the small ball bearing on the drive shaft
assembly was removed.
14. Clean the inside of the gear housing.
Clutch Rotor
Socket Screw
Retaining Ring
Clutch Field Wires
Drive Shaft
Assembly
Clutch
Field
Clutch Field
Set Screw
EPC
Housing
Lock
Washer
Clutch
Rotor
Installing the clutch Rotor Assembly, clutch Field and Drive Shaft
Assembly
1. Install a new o-ring into the center bore of the gear housing.
2. Apply Loctite retaining compound #635 to the outside
diameter of the large bearing on the drive shaft. Do not get
retaining compound on the faces of the bearing.
3. Install the drive shaft assembly into the center bore of the
gear housing, keeping it square to the housing so it does not
bind. Once the large ball bearing on the drive shaft assembly
is half way into its bore, a soft hammer may be used to gently
tap the assembly into position.
ImPORTANT: Do not force the drive shaft assembly into position.
4. Install the retaining ring into its groove next to the large ball
bearing.
5. 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.
6. Route the two clutch field wires through the grommet and
into the EPC housing.
7. 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.
NOTE: Apply blue Loctite to the four clutch field set screws
prior to installation.
8. Thread one of the 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.
9. When the set screw is properly seated, install the remaining
three set screws. Do not tighten the set screws.
10. Using a crossing pattern, tighten each of the setscrews
until they are snug. Once all four set screws are snug, use a
crossing pattern to tighten and torque the set screws to 30–40
in.-lbs.
ImPORTANT: It is very important to evenly snug, tighten, and
torque the clutch field set screws in a crossing pattern. This
ensures the clutch field will stay centered in the gear housing.
11. Line up the three screw holes and dowel pin hole on the clutch
rotor with the screw holes and dowel pin on the drive shaft
assembly hub. Place the clutch rotor onto the hub.
12. Using a 3/16” hex wrench, thread the three socket screws and
lock washers through the clutch rotor and into the drive shaft
assembly hub. Evenly snug, tighten, and torque the socket
screws to 75–85 in-lbs.
13. Make sure the friction surface of the clutch rotor is clean and
free from oil or grease.
14. Follow steps 17–20 in the “Replacing the Gears” procedure to
mate the pump housing with the gear housing.
Electrostatic discharge (ESD) potential could cause
damage to electronic pressure control. use Titan ESD
wrist strap P/N 0507958 or equivalent when working
on electronic pressure control.
15. Locate the two clutch field wires in the EPC housing. Gently
pull the wires fully into the EPC housing so that there is no
slack in the gear housing. Connect the wires to their proper
terminals on the EPC board (refer to the labels created earlier
in this procedure or the electrical schematic in the Parts List
section of this manual).
16. Carefully place the EPC assembly over the EPC housing taking
care not to pinch any wires.
17. Install the four screws that secure the EPC assembly to the EPC
housing. Tighten securely.
