LIGHTING GP 3A7758 - Caterpillar

Start by:a. Disassemble ejector bucket. 1. Install the ejector bucket cylinder in tooling (A). The weight of the ejector bucket cylinder is 40 kg (88 lb).2. Remove bolts (12) and washers that hold head (9) to cylinder body (1).3. Use tooling (A) to slide rod assembly (10), with head (9), out of cylinder body (1).4. Remove wear ring (3) and seal assembly (4) from piston (5).5. Use tooling (B) to remove nut (2). Remove piston (5) and washer (6) from rod assembly (10).6. Slide cylinder body (1) onto rod assembly (10). Install bolts (12) that hold head (9) to cylinder body (1). Tighten the bolts finger tight.7. Remove head (9) and cylinder body (1) from rod assembly (10) as a unit.8. Remove bolts (12) and head (9) from cylinder body (1).9. Remove O-ring seal (7), back-up ring (8), wear ring (13), seal assembly (15), U-cup seal (16), and lip seal (17) from head (9).10. Remove the two lip seals and bearing (14) from cylinder body (1).11. Remove the two lip seals and bearing (11) from rod assembly (10).Assemble Bucket Cylinders
1. Install bearing (11) and bearing (14). Make sure that the bearings are centered in the bore.2. Apply 7M-7456 Bearing Mount Compound to the bores before installation. Use tooling (C) to install lip seals on either side of bearings (11) and (14). Make sure that the sealing lips are facing outward.3. Install O-ring seal (7), back-up ring (8), wear ring (13), seal assembly (15) and U-cup seal (16) in head (9). Apply a thin coat of clean hydraulic oil on the seals and on the wear ring.4. Apply 7M-7456 Bearing Mount Compound in the groove for lip seal (17). Install lip seal (17) in head (9). Make sure that the sealing lip is facing the rod end of the cylinder.5. Position head (9) on cylinder body (1) and install bolts (12) finger tight. Install rod assembly (10) in cylinder body (1).6. Remove bolts (12). Remove cylinder body (1) from rod assembly (10) and head (9).7. Install washer (6) and piston (5) on rod assembly (10).8. Apply 4C-4493 Thread Lubricant on the threaded end of rod assembly (10) and install nut (2). Use tooling (B) to tighten nut (2) to a torque of 1600 160 N m (1200 120 lb ft).9. Install seal assembly (4) and wear ring (3) on piston (5). Apply a thin coat of clean hydraulic oil on the seal assembly and on the wear ring.10. Install cylinder body (1) on rod assembly (10). Install bolts (12) and washers that hold head (9) to cylinder body (1). Tighten bolts (12) when the rod is fully extended. Tighten bolts (12) to a torque of 240 40 N m (180 30 lb ft).11. Remove the ejector bucket cylinder from tooling (A). The weight of the ejector bucket cylinder is 40 kg (88 lb).End by:a. Install lift cylinder.