JLG 740AJ, Руководство по обслуживанию и ремонту

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SECTION 3 - CHASSIS & TURNTABLE
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12. Press the rear shaft bearing (22) into the endcap. Install
the bearing with letters facing out. Press until bearing
surface is 0.08 ±0.01 in (2 ±0.25 mm) above endcap sur-
face.
13. Install timing pin (23) into its bore in the endcap. Install
the pin with its groove facing toward or away from the
shaft. Press the pin until the end protrudes 0.12 ±0.01 in
(3 ±0.25 mm) above endcap surface.
14. Install the valve plate (24) onto the endcap. Install the
valve plate with the yellow surface toward the cylinder
block. Align the slot in the valve plate with the timing
pin. Apply a liberal coat of assembly grease to the end-
cap side of the valve plate to keep it in place during
installation.
15. Install the endcap (25) onto the housing with the end-
cap screws (26). Check to ensure the endcap will prop-
erly seat onto the housing without interference.
Improper assembly of the internal components may
prevent the endcap from seating properly. Ensure the o-
rings seat properly when installing the endcap.
16. Using an 8 mm internal hex wrench, tighten the endcap
screws. Tighten the screws in opposite corners slowly
and evenly to compress the servo spring and properly
seat the endcap. Torque endcap screws 35-45 ft. lbs.
(47-61 Nm).
17. Before installing the shaft seal, ensure the shaft turns
smoothly with less than 120 in. lbs. (13.5 Nm) of force. If
the shaft does not turn smoothly within the specified
maximum force, disassemble and check the unit.
23
23
22
24
3 mm
[0.12 in]
2 mm
[0.08 in]
23
22
22. Rear Shaft Bearing
23. Timing Pin
24. Valve Plate
Figure 3-32. Valve Plate and Rear Bearing
26
25
8 mm
(47-61 Nm)
35-45 ft.lbs.
25. End Cap
26. Screw
Figure 3-33. End Cap