HYDRAULICS 1.112 Crowd cylinder (51) Removal 1. Extend the boom and rest the carriage on the ground. 2. Stop the engine, apply the parking brake and disconnect the battery. 3. Refer to page 1.1 and dump hydraulic pressure. The crowd cylinder weighs 75 kg (165 lb). Take care when handling, to avoid damage to components and injury to personnel. NOTE: Make a note of the position of the spacers located on the upper and lower cylinder attachment pins. 4. Remove the two nuts (1), washers (2), socket headed bolts (3) and washers (2) securing lower cylinder attachment pin (4) to the lever (5). Drive out lower attachment pin and remove the spacer (6) from each side of cylinder (7) eye end. 1.
Nut (2 off) 2. Washer (4 off) 3. Socket head bolt (2off) 4. Lower attachment pin 5. Lever 6. Spacer (2 off) 7. Cylinder (51) 8. Bolt 9. Washer 10. Cover plate 11. Boom 12. Bolt 13. Washer 14. Upper attachment pin 15. Spacer (2 off) NOTE: Cover plate (10) is only fitted to later models. 5. Remove the bolt (8) and washer (9) securing the cover plate (10) to the front of the boom (11) and remove cover plate, if fitted. 6. Identify the hydraulic hoses to make sure they are reconnected correctly. Disconnect the two hydraulic hoses from the cylinder, blank the cylinder and open hoses. 7. Support the cylinder. Remove the bolt (12) and washer (13) retaining the upper attachment pin (14).
Drive out the upper attachment pin and remove the cylinder from the machine. Remove the spacer (15) from each side of cylinder eye end. Installation 1. Installation is the reverse of the above procedure. Refer to page 1.56, check the hydraulic level and replenish tank before engine is started. 2. Purge the hydraulic system by starting the engine and operating the service to fully extend and retract cylinder several times. 3. Refer to Page 1.56, check the hydraulic level and replenish if necessary.