Denison Hydraulics Goldcup 6, Installation & Overhaul Instructions, Page: 19 / 24

SECTION V – ASSEMBLY PROCEDURES
SHAFT AND SEAL 1. Stand the motor in an upright position with the port block inlet and outlet pads turned
INSTALLATION down.
See Figure 9 2. Remove the two 1/4-20 x 1 1/4” screws that were temporarily used to hold the cradle in
the mounting flange. Install the shaft and bearing assembly (1) in the mounting flange
and cradle. Be certain that there are no burrs or sharp edges on shaft seal area of the
shaft.
3. For a rigid shaft application use the shim (2) that results in least clearance around the
shaft bearing. Do not use a shim with a floating shaft.
4. Install the snap ring (3) in the mounting flange to retain the shaft assembly. Make sure
that the ring is fully seated in the groove. Use the ring that results in the tightest fit.
SEAL ASSEMBLY The seal assembly (4) is available as a complete unit only.
CAUTION: Before installing the seal assembly, examine all the parts. The lapped
seal seat and the carbon ring have a precision finish that must be handled with care.
Be certain that both parts are free of scratches, marks and cracks.
1. Install the spring retainer (e) over the shaft and against the retaining ring on the shaft
assembly. Place the spring (d) against the retainer (e). Apply oil to the inner surface
of the rubber friction ring (f) and position the shell containing the rubber friction ring (f)
and carbon ring (c) over the shaft with the carbon ring exposed. Apply heavy grease to
the square section rubber seal (a) and install on the cast iron seat (b).
2. Install the seat and seal in the seal retainer (6) with the lapped side of the seat in
position to contact the carbon ring. Place the seal retainer assembly and gasket (5)
over the shaft with the lapped surface against the carbon face.
3. Install the four gaskets (7) on the four screws (8) and insert in the seal retainer (6).
Depress the seal retainer only far enough to start the four screws and tighten evenly.
Torque to 10 ft. lbs.
COUNTER-BALANCE SERVO 1. Install the two spacers (11) on the two screws (12) and insert through the balance plate
STEM ASSEMBLY (10) and the servo stem (9).
2. Insert these parts through the opening in the side of the housing assembly and position
the screws over the two 10-24 tapped holes in the rocker cam.
3. Hold these parts against the cam and alternately tighten screws (12) to hold the
assembly firmly in place. Torque screws to (5) ft. lbs.
CONTROL COVER ASSEMBLIES 1. Lubricate O-rings (21 & 22) and install in counter-bore and groove in covers.
Figure 9 2. Position the cover assemblies (15 & 16) over the two dowel pins on the housing pads
and secure with seals (13) and screws (14). Torque to 45 ft. lbs.
The input cover assembly must be installed on the right hand side of the motor
with a “B” suffix. Install the output cover assembly on the right hand side on
models with the “A” suffix.
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