Function Pump; Disassembly - JLG 1850SJ Service And Maintenance Manual

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Table of Contents

SECTION 5 - BASIC HYDRAULIC INFORMATION & HYDRAULIC SCHEMATICS

FUNCTION PUMP

1. Remove the control from the endcap by removing the 4

control bolts (C300), using a 4 mm internal hex wrench.

2. Remove and discard the 4 O-rings (C200).

3. Remove the 4 endcap screws (J030) using a 10 mm

internal hex wrench.

4. Carefully remove the endcap (J020). Prevent the valve

(B090) plate from falling off.

5. Place the endcap and valve plate in a clean area, pro-

tecting them from contamination.

6. Remove the bearing cup (B010), bearing cone (B020)

and housing O-ring (K060). Discard the O-ring.

7. Tilt the housing on its side to allow fluid to drain.

8. Remove the cylinder block kit while holding onto the

front shaft.

9. Set cylinder block on a clean dry surface.

10. Rotate pump back to a position so that the shaft is

pointing down.

11. Pull the shaft (J010) from the shaft seal.

12. Compress the bias spring (B025) and rotate the servo

piston assembly (P020) towards the swashplate (B040).

13. Lift the swashplate/servo piston assembly up at an

angle and remove it from the housing.