BODY (UPPERSTRUCTURE) / Center Hinge Disassemble Center Hinge 2. Remove bolts (2) (ZW220 (3 used), ZW250 (4 used)) and bolts (3) (ZW220 (4 used), ZW250 (6 used)) from flange (4) of the upper hinge part. Remove flange (4), shims (5) (2 used) and pin (22) from front frame (25). CAUTION: The center hinge is required to disassemble for the major maintenance work such as removal of the front frame from the rear frame. At this time, move the machine into the factory. Preparation Carry out the following procedures before disassembling the center hinge. 1. Remove the cab and the cockpit. : 24 mm 3. Remove bolt (11) and washers (12, 13) from pin (14). Remove pin (14) from front frame (25). : 24 mm 4.
Remove bushing (6) from front frame (25). (Remove bushing (6) after cutting by gas or pulling out by welding a cardboard.) 2. Remove the mounting component between the front frame and the rear frame. Propeller Shaft Steering Cylinder Hydraulic Hose Brake Piping Wire Harness Removal of Hinge Pin 1. Support the front frame and the rear frame by using the firm support stands. CAUTION: Front frame (25) weight: ZW220: 1450 kg (3200 lb) ZW250: 1910 kg (4250 lb) 5. Attach a nylon sling onto front frame (25). Hoist and move front frame (25) so that bearing (10) can be removed. 6. Remove bushing (20) from front frame (25). 7. Remove bolts (21) (6 used) from cap (19).
Remove caps (7, 19) and shim (8) from front frame (25). ZW220 : 17 mm ZW250 : 24 mm 8. Remove dust seals (9) (2 used) from caps (7, 19). 9. Remove bearing (10) from front frame (25). W4GB-02-03-002 W2-3-3