0378438 JOHNSON RING SET,Piston,.040 o.s.

Table 1
Required Tools
Tool Part Number Part Description Qty
A 1U-9200 Lever Puller 1 Note: This procedure is intended for lowering the hinged bottom guards. The complete removal of the hinged bottom guards must be done with the use of a suitable floor jack. Refer to Disassembly and Assembly, "Bottom Guard - Remove" for the procedure to remove the hinged bottom guards. Fully read this procedure and fully understand this procedure before proceeding with the work.Note: Use caution around potential pinch points. Be alert for possible movement of the guards.Note: Do not place any part of your body under the bottom guard unless the mounting nuts are installed. Make sure that the suitable restraining devices are tight before the mounting nuts are loosened.Note: Inspect the suitable lifting device and all suitable restraining devices prior to installation for proper condition and proper operation.Note: When the suitable restraining device is secured to the machine, ensure that there is no interference that is caused by dirt or debris that could cause the inadvertent movement of the bottom guard as weight is applied.
Illustration 1 g01878233Note: Refer to the arrows in Illustration 1 for the approximate location for attaching the suitable restraining devices and lifting devices to the machine. The suitable restraining devices and the lifting devices must be centered in the fore and aft direction on the bottom guards.Note: Ensure that all hinge pins, cotter pins, and washers are in place in the bottom guard. Do not remove any of these parts. Inspect both halves of the hinges. Make sure that both halves of the hinges are properly attached to the bottom guard and the tractor frame. If any cracks are observed on the hinges or the hinge welds do not use this procedure but instead use the procedure for complete removal of the bottom guard.Note: The weight of the forward bottom guard is approximately 204 kg (450 lb). The weight of the rear bottom guard is approximately 329 kg (725 lb). Bottom guards may contain a significant amount of rock, dirt, liquids and debris, which will result in significant additional weight.
Illustration 2 g01714394
Typical Example
Attach the suitable restraining device (1) to the side of the machine on the hinged side of the bottom guard. Attach Tooling (A) or a suitable lifting device to the other side of the machine. Acceptable locations include the track or the bulldozer push arm. An external hoist is an acceptable alternative to Tooling (A) but care must be taken in order to avoid fouling the hook on a corner of the tractor. Attach the suitable restraining device (1) onto Tooling (A) and pull tightly in order to firmly secure the bottom guard (2) into the correct position.
Illustration 3 g01623465
Typical Example
Loosen nuts (3) that secure bottom guard (2) to tractor frame (4). Do not remove nuts (3). Maintain at least one half of the thickness of the nut of thread engagement on all nuts.
Ensure that there are no people under the bottom guard. Lower the suitable lifting device slightly and observe if the bottom guard is resting on the nuts. If necessary, pry bottom guard (2) loose from the tractor main frame (4). Some bottom guards have a hole for a pusher bolt in the flange on the side opposite of the hinges. Once bottom guard (2) is resting on nuts (3), remove any excess slack in the restraining device.
Remove nuts (3) that are farthest away from you first. Remove the nuts that are closest to you last in order to prevent the need to reach across the loosened guard.
Illustration 4 g01623471
Typical Example
Use Tooling (A) or a suitable hoist to lower the bottom guard to ground level. The bottom guard pivots on hinge pin (5).