JLG 450A_AJ Series II Service Manual - Manual (Page 107)

SECTION 3 - CHASSIS & TURNTABLE
3121180 – JLG Lift – 3-57
3. Install inner block spring washer (4), block spring
(5), and outer washer (6) in cylinder block. Using a
press, compress block spring enough to expose
retaining ring groove. Wind spiral retaining ring (7)
into cylinder block.
4. Turn block over and install retaining ring (8), hold-
down pins (9), and ball guide (10) to cylinder block.
IF REUSING PISTONS, INSTALL THEM IN ORIGINAL BLOCK
BORES.
5. Install pistons (11) to slipper retainer (12). Install pis-
ton/retainer assembly in cylinder block. Ensure con-
cave surface of retainer seats on the ball guide.
Lubricate pistons, slippers, retainer, and ball guide
before assembly. Set cylinder kit aside on a clean
surface until needed.
6. Install journal bearings (13) into housing seats. Use
assembly grease to keep bearings seated during
assembly. Ensure locating nubs drop into cavities in
seats. If reusing bearings, install them in original
location and orientation. Lubricate journal bearings.
7. Install swashplate (14) in housing. Tilt swashplate
and guide servo lever ball into its socket in servo pis-
ton rod. Ensure swashplate seats into journal bear-
ings and moves freely. Lubricate swashplate running
surface.
7
6
5
4
8
9
10
12
11
4. Block Spring Washer
5. Block Spring
6. Outer Washer
7. Spiral Retaining Ring
8. Retaining Ring 9. Holddown Pins
10. Ball Guide
11. Piston
12. Slipper Retainer
Figure 3-37. Cylinder Kit Assembly
14
13
13
13. Journal Bearings
14. Swash Plate
Figure 3-38. Swash Plate and Journal Bearing