PISTON GP 9Y8218 - Caterpillar

1. Move chain free of roller (1) with a hydraulic jack (2). Install a chain between frame and flight for added safety. 2. Remove four bolts (3), cap assembly (4) and gasket from the roller. 3. Install tooling (A) and a hoist to roller. 4. Remove nut (6), washer bolt (5) and the spacer (7) between the elevator frame and the roller. Weight of the roller is 36 kg (80 lb.).Install Elevator Chain Center Rollers
1. Install tooling (A) and a hoist on the roller. Put roller (1) in position. 2. Install bolt (2) and the spacer between the roller and the elevator frame. Install washer (4) and nut (3). Tighten nut to a torque of 1230 70 N m (907 52 lb.ft.). Remove tooling (A) and hoist. 3. Install gasket (5) and cap assembly (6) on the roller. 4. Lower the chain assembly on the roller and remove the hydraulic jack (7).Disassemble Elevator Chain Center Rollers
START BY:a) remove elevator chain center rollers 1. Remove carrier (2) from roller (1). 2. Remove bearing cone (4) and spacer (3) from roller. 3. Remove lip type seal (5) and bearing (6) from roller. 4. Use tooling (A) to remove bearings from the roller. 5. Remove spacer (7) from roller if necessary.Assemble Elevator Chain Center Rollers
1. Install spacer (1) in roller. 2. Install bearing cups in roller against spacer (1) with tooling (A). 3. Install bearing cone (2) in roller. 4. Install lip type seal with tooling (B) as shown with the lip toward the carrier. 5. Install spacer (3) and bearing cone (4). 6. Install carrier (5) in roller.END BY:a) install elevator chain center rollers