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When grasping a Motor or one of its parts in a vise, always use
leather or copper vise jaw covers to protect the surface of the
part and reduce the likelihood of damage. This is particularly
important when clamping threaded members, shafts with splines,
etc. Apply o-ring lubricant to each o-ring before assembly and use
only new gaskets when reassembling the Motor.
When installing Planet Gears in a Spindle, Gear Head or Gear
Frame, always support the front web and press in the shaft from
rear to front. Shaft holes through the webs are slightly tapered
so that shaft is tighter in front web. Always replace Planet Gears
in sets.
Assembly of the Motor/Brake Module
Refer to Drawing 45503323 and associated part lists, for detailed
information regarding the part numbers and position within the
sub-assembly.
If previously disassembled, position the Ball (27), within the
Backhead (25). Place the O-Ring (28) onto the Spool (29). Apply
a small amount of thread sealant to the threads of the Spool and
thread into the Backhead, tighten securely.
Assemble the Brake Driver sub-assembly.
Place the Snap Ring (21) onto the Brake Driver (19). Place
Washer (20) over Snap Ring. Using an arbor press, and a punch
appropriate to press on the bearing inner race only, press the
Bearing (22) onto the brake driver until it stops against the
Snap Ring.
Clamp the Brake Adapter (30) in a vise, vertically; clamping
on the hex portion of the Adapter. Position the Spacer (23) on
the Adapter.
Position the Brake Driver, Bearing, Washer, and Snap Ring
assembly (19, 20, 21, and 22) onto the Adapter.
Place the O-ring (18) and Retainer (17) onto the Brake Drive
and secure with the Screw (16). Tighten to 30 in-lbs.
4. Insert the Gasket (31) into the counterbore of the Backhead for
the Motor Housing and make sure it is properly aligned.
5. Place O-ring (32) in Backhead (25).
6. Assemble the Backhead (25) to the Motor Housing (33) using
three Screws (24). Tighten to 120 in-lbs.
7. Place the Brake Driver sub-assembly (see paragraph 3 in this
section) in the Backhead (25); the bearing must seat fully in the
bore provided in the Backhead. Set aside and proceed with the
next item.
Brake Spring and Piston
Housing Assembly
Pressure Plate
Piston
Piston Nut
Pressure Plate
Screw
0.006 to 0.012 in.
(0.15 to 0.30 mm)
(Dwg. MHTPA0488)
7.
8.
1.
2.
3.
a.
b.
c.
d.
8. Lightly coat the Piston Seals (8, 10) with O-ring lubricant, and
install them in their respective grooves on the Brake Piston (9).
9. Taking care not to cut the Seals, slide the Piston into the Brake
Spring and Piston Housing (11).
10. Place the Spring and Piston Housing on the workbench so that
the three spring cavities are upward.
11. Place a Spring (12) in each cavity.
12. Install the Pressure Plate Screw (7) so that the screw head enters
the counterbore in the Pressure Plate (6). Place the Pressure Plate
and Screw over the Springs so that the Screw enters the hole in
the Brake Piston.
13. Using a vise, carefully compress the Pressure Plate against the
Brake Spring and Piston Housing until the Screw or stud protrudes
through the Piston. Start the Piston Nut (5) onto the Screw (7).
14. Remove the assembly from the vise.
15. Tighten the Pressure Plate Screw and Piston Nut until a .006 to
.012 in. (0.15 to 0.30 mm) gap exists between the Pressure Plate
and Piston. See Dwg. MHTPA0488.
16. Place Plate (4) in the recess of the Spring and Piston Housing, and
install the Plate Screws (3).
17. Place the Backhead (25), and assembled components on a work
table so that the brake side is up.
18. Place a Brake Plate (14) followed by a Brake Disc (15), Brake
Plate, Brake Disc, and two Brake Plates over the Brake Driver,
aligning the notches in the Brake Plates with the bolt holes in the
Backhead (25). Insert the O-ring (13) into the hole in the Brake
Piston Housing (11). Align the bolt holes in the Brake Spring and
Piston Housing with those in the Backhead (25) and install the
four Shoulder Bolts (1) and Lockwashers (2).
19. Push the Rear End Plate (37), flat face leading, onto the short hub
of the Rotor (39).
20. Push the Rear Rotor Bearing (36) onto the short hub of the Rotor
into the recess of the Rear End Plate and install the Rear Rotor
Bearing Retainer (34) in the groove on the shaft of the Rotor to
retain the Bearing and End Plate.
21. Place a Vane (40) in each vane slot in the Rotor and place the
Cylinder (38) down over the Rotor and Vanes and against the Rear
End Plate. Make certain the holes in the Cylinder and End Plate
can be aligned. If they don’t align, invert the Cylinder.
22. Press the Front Rotor Bearing (42) into the bearing recess of the
Front End Plate (41).
23. Press the Front Rotor Bearing, Front End Plate leading, onto the
spline end of the rotor shaft until the End Plate contacts the
Cylinder.
24. Use a 1/8” rod approximately 12” long to align the cylinder dowel
holes in the Front End Plate, Cylinder and Rear End Plate. Insert
the end of the rod at the Rear End Plate end into the dowel hole
in the Motor Housing. Slide the assembled motor along the rod
into the Motor Housing until it stops against the bottom of the
motor bore.
25. Remove the assembly rod and install the Cylinder Dowel (35) in
its place.
26. Install the two Motor Retaining Washers (43), the concave face of
both Washers trailing, over the hub of the Front End Plate.
Assembly of Gearing Module
Refer to Drawing 45503422 and associated parts list, for detailed
information regarding the part numbers and position within the
sub-assembly.
If the Spindle Planet Gear Bearings (10) were removed from the
Spindle Planet Gears (11), press new Bearings into the Gears using
a needle bearing inserting tool similar to the one shown in Dwg.
TPC488. Press one Bearing in from each end of the Gear until
they are flush with the face of the Gear. If any Gears are damaged,
install a complete new set of Gears.
Support the web at the output end of the Spindle (12) on the
table of an arbor press and position a Spindle Planet Gear with
bearing inside the web making certain that the pin holes are in
alignment. The holes in the webs of the Spindle are tapered and
smaller toward the output end of the Spindle. Press the Spindle
Planet Gear Shafts (9) through the rear web and Bearings into the
front web until the Shaft is flush with the face of the rear web.
1.
2.
3.
