COUPLING 1300139 - Caterpillar

1. Remove two bolts (1) and cover and handle assembly (2). 2. Disconnect spring (3) from the plate.3. Remove cotter pin (4) from the handle shaft. 4. Remove four bolts and nuts (6) and the latch assembly. 5. Remove two screws (7), handle (8) and rubber pad (9).6. Remove plate (5) from the inside of the door. 7. Remove two clips (10), bracket (11) and the link from latch assembly (12). 8. Remove striker (13) and the shims from the cab frame.Install Cab Door Latch And Striker
1. Install the original shims and striker (1) into the cab frame. 2. Assemble link (3), bracket (4) and two clips (5) to latch assembly (2). 3. Put plate (6) and latch and bracket assembly (7) in position. Install the four bolts that hold the latch assembly in place. 4. Put rubber pad (10) and handle (8) in position. Make an alignment of the shaft on the handle with hole in bracket (4) and install screws (9). 5. Install cotter pin (12) in the shaft and the bracket. Connect spring (11) to the bracket and plate (6). 6. Install cover (13) and the handle on the door. Install the two bolts that hold the cover in place.7. Make an adjustment to the cab door and striker as follows: a) Close the door. Adjust striker (1) so it is vertically on the center of the latch, engages the jaws smoothly and does not move the door up or down. Check for contact horizontally between the striker head and the rotors or latch back plate. There must be no contact. Add or remove shims as necessary between the stand cab frame.b) Check for both secondary and primary latch positions. Primary latch position - door is fully closed and latch is fully engaged. Secondary latch position-door latch is engaged but door is not fully closed. If the door can not be closed to the primary latch position, loosen the striker and adjust it outward until the door can be closed to the primary latch position. Tighten the striker. It can be necessary to make an adjustment of the door hinge to get the correct primary latch position or correct door seal pressure.c) Check the adjustment of the striker. Push slowly on the door near the latch until the latch engages the striker in the secondary position. Put more pressure on the door until the latch engages in the primary position.
It is possible to adjust the door so that it is fully closed against the seal with the latch in the secondary position. This is a below standard (substandard) latch position, since the latch does not have as much strength in the secondary position, and must not be permitted. Adjust the door so it will close in the primary latch position. Excessive seal pressure will result in higher torque load to open the door.
Use only a dry type lubricant on the door latch and striker.