Bulletin 2751-001-M1/USA
Service Manual
HGA Hydraguide™
Hydraulics
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
Greeneville, Tennessee
23
HGA Column
1. 475109A1 Jacket Tube Clamp
2. 403813 Coupling
3. 401362 Retaining Ring (Spring)
4. 040050 Dowel Pin
5. 089142 Input Shaft
6. 096245 Jacket Tube (Chart)
7. 063980 Bushing
8. 026045 Wheel Nut
6. & 7. 096245A1 Jacket Tube
TO DISASSEMBLE COLUMN
1. Remove steering wheel and wheel nut (8).
2. Loosen clamp assembly (1) on upper cover of
HGA unit. If the system has a column support
clamp, this clamp should be loosened at this time.
3. If there is a horn contact assembly on the column,
remove the 4 small screws from the metal cover (if
applicable), and remove the metal cover and
gasket. Remove the 2 small screws from the horn
contact assembly.
4. Pull the jacket tube (6) and bearing assembly (7)
off of the wheel tube (5).
5. Remove the retaining springs (3) and discard.
6. Lightly tap out the pins (4) with brass rods and
hammer. Do not hit the pins with heavy hammer
blows, as this may damage the HGA unit.
7. Remove the wheel tube (5).
8. Remove the coupling (2).
9. Remove the clamp assembly (1).
TO ASSEMBLE COLUMN
1. Assemble the clamp assembly (1) onto the HGA
unit. (Do not tighten.)
2. Assemble the coupling (2) and align pin hole.
3. Assemble one of the pins (4) and one of the new
retaining rings (3).
4. Assemble the wheel tube (5) and align pin hole.
5. Assemble the other pin (4) and retaining ring (3).
6. Apply a small amount of clean grease to the inside
of bearing assembly (7).
7. Assemble the jacket tube (6) and bearing assem-
bly (7) over the wheel tube, through the clamp
assembly (1) and onto the HGA unit upper cover.
8. Tighten the clamp assembly (1) bolt to 15-20 ft.
lbs.
9. Assemble the steering wheel and tighten the wheel
nut to 32.5 - 37.5 ft. lbs.
10. If the system has a column support clamp, it is
extremely important that the jacket tube (6) align
with this clamp in the free state. If misalignment is
evident, the HGA unit must be shimmed at the
mounting surface to eliminate the misalignment, or
damage may result to the HGA unit.
11. If applicable, assemble the horn contact assembly,
cover gasket and metal cover on the jacket tube
(6).
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