PSP FOR REPAIRING THE IMPLEMENT VALVE MOUNTING BRACKET ON CERTAIN 14G AND 16G MOTOR GRADERS - PS4528 - MAILED US AND CAN ADA, CACO, COFA, CFEL, COSA Caterpillar

U-183
A-127
AU-117
E-111
O-141
5051   PS4528
NOTE: This Program can be administered either before or after a
failure. In either case the decision whether to apply the Program
is made by the dealer. When reporting the repair, use "PS4528"
as Part Number, "7755" as Group Number, and "96" as Description
Code.

September 30, 1991

The mounting bracket for the implement valve may crack at the weld where it
is attached to the frame on certain 14G and 16G Motor Graders used in severe
applications.

Model Identification Number
14G  96U7046-8061
16G  93U2079-3165, 75445, 75447, 75448, 75454-75459, 75462, 75463,
75466, 75468, 75470

Fabricated - See the attached procedure

See the attached rework procedure.

Product Caterpillar Dealer Suggested Customer Suggested
smu Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs.
(D/N) (Cost)  (C/L) (Sell)
0-2000 - 11 0 0 0 0
2001-4000 - 5.5 0 5.5 0 0
NOTE: This is an 11-hour job.

Any parts removed (with the exception of cores used for Caterpillar
Remanufactured parts) can be rendered useless and scrapped immediately upon
completion of the repair.
Rework Procedure
REMOVE THE IMPLEMENT VALVE ASSEMBLY AS FOLLOWS:
1. Remove the steps from the cab.
2. Remove the horn from the cab.
3. Remove the cotter pins at the valve stems to disconnect the linkage
inside the cab.
4. Remove the hydraulic lines as necessary to allow the valve bank to be
moved forward of the cab and secured. See Illustration 1.
5. Fasten a suitable lifting device to the valve body and remove the bolts
holding the valve body to the brackets.
6. Secure the valve bank as shown in Illustration 1.
****** IMAGE: SEBE4398.00001.001
CAPTION: Illustration 1
REMOVE THE MOUNTING BRACKETS AS FOLLOWS:
1. Use caution when gouging. Do not gouge into the frame.
2. Use a gouging tip to free the mounting bracket from the frame. Gouge at
the plug weld only.
3. Use a gouging tip to remove the mounting bracket from the support
bracket attached to the cab floor.
4. If necessary, tap the bracket with a hammer to break it free from small
remaining welds.
5. Grind the surface of the frame and support bracket smooth. Grind as
little as possible.
FABRICATE THE NECESSARY PLATES AND WELD THEM TO THE FRAME
NOTE: Fabricate all parts from 1020 steel.
1. Cut two of each of the plates for each side of the valve body. Four
total of each plate. See Illustrations 2-8.
2. Weld the plates to the frame as shown in Illustration 9.
3. Grind the horizontal groove weld flush before welding the plates with
the slots perpendicular to the side plate.
4. On 14G Motor Graders only, replace the bosses that are used to restrain
the hoses by ones that are 12 mm (0.5") longer. Use appropriate clips
to keep the hoses from rubbing on the edge of the cab plate.
5. Position and weld the gusset to the plate and support bracket as shown
in Illustration 9.
PAINT AND INSTALL THE IMPLEMENT VALVE AS FOLLOWS:
1. Paint the new mounting brackets and the surrounding areas.
2. Position the implement valve and start to install each of the bolts that
hold it. Adjust the position of the valve bank so that valve stem
operation is not limited by the clearance holes inside the cab. Tighten
the mounting bolts.
3. Connect the linkage inside the cab.
4. Install the horn.
5. Install the steps.
****** IMAGE: SEBE4398.00001.002
CAPTION: Illustration 2 - 14G & 16G
****** IMAGE: SEBE4398.00001.003
CAPTION: Illustration 3 - Upper RH - 14G & 16G
****** IMAGE: SEBE4398.00001.004
CAPTION: Illustration 4 - Upper LH - 14G & 16G
Illustration 5 - Lower LH - 16G
****** IMAGE: SEBE4398.00001.005
CAPTION: Illustration 6 - Lower RH - 16G
Illustration 7 - Lower LH 14G
Illustration 8 - Lower RH 14G
****** IMAGE: SEBE4398.00001.006
CAPTION: Illustration 9 - 14G & 16G