Denison Hydraulics Goldcup 6, Installation & Overhaul Instructions, Page: 8 / 24

SECTION III – UNIT DISASSEMBLY
The instructions contained in this section cover a complete teardown of the subject motor. Disassemble only as far as necessary to replace or repair
any worn parts.
DISASSEMBLY Position motor unit so the shuttle valve assembly is on the bottom. A bench or similar
suitable surface capable of supporting unit should be used. Disassembly area should be
clean.
CONTROLS 1. Remove the four screws (14) from the side (16) and remove the input shear seal
(See Figure 9) assembly.
2. Remove the four screws (14) from the side cover (15) and remove the counter balance
shear seal assembly.
3. Remove the two screws (12) and spacers (11). Remove the servo stem (9) and
plate (10).
BARREL HOLD-DOWN 1. Remove snap ring (8), end cover (6) and O-ring (7).
(See Figure 8) 2. Remove cotter pin (5), hold-down nut (4), thrust washers (1), bearing (2) and
seal ring (3).
PORT BLOCK 1. Remove four screws (5) that secure the port block (1) to the housing (9).
(See Figure 7) 2. Remove port block (1) and gasket (8). Remove port plate (7) and port plate
pins (6).
CAUTION: When removing port block, the port plate can cling to the face plate
because of oil film. Make sure it does not fall and become damaged.
BARREL AND HOLD-DOWN
Remove the barrel assembly by grasping the hold-down shaft and lifting the complete
SHAFT assembly out of the housing.
DRIVE SHAFT REMOVAL 1. Remove the four screws (8) and gaskets (7).
(See Figure 9) 2. Remove seal retainer (6), and gasket (5). See view of item 4.
3. Carefully remove the carbon ring and the remainder of the shaft seal from the shaft.
Do not scratch seal area of the shaft.
4. Remove snap ring (3) and the shaft and bearing assembly (1). Remove spacer or
ring (2).
HOUSING REMOVAL After shaft assembly has been removed, position the unit on end with the mounting
(See Figure 6) flange turned down.
1. Push the ends of the small tube lines (5) away from the housing (4).
2. Lift the housing from the mounting flange, remove the gasket (3), and dowel pins (7)
from the mounting flange.
3. Do not remove the roll pins and the bearing from the housing unless the bearing is
damaged and must be replaced.
ROCKER CAM AND CONTROL 1. Remove the complete assembly from the mounting flange and position on a clean
STROKING ASSEMBLY flat surface with the two tubes (2) in a horizontal position and located at the top. Mark
(See Figure 4) the cam (24) and cradle (20) as indicated in Figure 3. These marks will determine
positioning of parts during reassembly.
Caution: Do not bend these lines.
(See Figure 3) 1. Position the assembly in an upright position on the flat surface on the cradle (20).
Remove the retaining ring (1) and thrust washer (2).
2. Remove the piston and shoe assembly (4) and the creep plate (5) from the cam (24).
Carefully remove the screws (6a) and (6) that secure the servo input parts (7, 8 and) to
the cam (24).
3. Remove the four 7/16” screws (10) and eight 1/4” screws (11) and (12) from the control
covers (15R) and (15L).
4. Remove the four dowel pins (16) and remove the two chambers (17). Remove the two
special seats (18) and the four steel balls (19).
5. Remove the two vane seal cartridge assemblies (23), vane springs (21) and the four
hold-down vanes (22) from the rocker cam (24).
6. Remove the rocker cam (24) from the cradle (20).
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