PSP FOR MODIFYING THE LOWER HITCH AND INSTALLING A NEW LOWER HITCH PIN ON 508 SKIDDERS - PS0443 - MAILED US AND CANADA, COS A, LIMITED COFA Caterpillar

PSP FOR MODIFYING THE LOWER HITCH AND INSTALLING A NEW LOWER HITCH PIN ON 508 SKIDDERS - PS0443 - MAILED US AND CANADA, COS A, LIMITED COFA

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Caterpillar: Confidential Yellow

PSP FOR MODIFYING THE LOWER HITCH AND INSTALLING A NEW LOWER HITCH PIN ON 508 SKIDDERS - PS0443 - MAILED US AND CANADA, COS A, LIMITED COFA

NOTE: The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.


U-95
AU-60.1
O-75
7116   PS0443
NOTE: This Program can only be administered after a failure
occurs. The decision whether to apply the Program is
made by the dealer. When reporting the repair, use
"PS0443" as Part Number, "7755" as Group Number, and "96"
as Description Code.

Termination Date

May 31, 1992

Problem

The lower hitch pin may not have as long a service life as desired on certain
508 Skidders. The hitch can be modified and an improved pin installed.

Affected Product

Model Identification Number
508  2HD1-316
9NC1-344

Parts Needed

1 - 4E1912 Pin
2 - 9H2258 Seal
2 - 9V6342 Bearing

Action Required

See the attached procedure.

Service Claim Allowances

Product Caterpillar Dealer Suggested Customer Suggested
smu/age Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs.
whichever (D/N) (Cost)  (C/L) (Sell)
comes
first
0-4000 100% 24 0 0 0 0
0-48 mo
4001-6000 33 1/3% 12 0 6 50% 6
48-60 mo
NOTE: This is a 24-hour job.

Parts Disposition

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
1. Follow the procedure in the Service Manual and separate the frames.
2. Remove the 9V9052 Boss from the 9V6881 Plate Assembly.
3. Fabricate a new boss as shown in Illustration 1. Install the new boss.
NOTE: The 38 mm diameter is used in production. The actual diameter
can vary by several mm as long as a diameter is used that will
assure complete clean-up during machining once the boss is welded
into position.
If using an English thickness plate a 1/2" or 9/16" plate will be
acceptable. (12.7 mm or 14.3 mm)
4. Bore the two bores on the plate of the non-engine end frame to 83.000
+/- 0.025 mm. (2 holes in line)
5. Lower the temperature of the 2-9V6342 Bearings. Press the bearings into
each of the bores. See Illustration 2
6. Replace the 2-9H2258 Seals. See Illustration 3.
7. Connect the frames and install the new 4E1912 Pin Assembly.
****** IMAGE: SEBE4299.00001.001
CAPTION: Illustration 1
Fabricate A New Boss
****** IMAGE: SEBE4299.00001.002
CAPTION: Illustration 2
Fabricate A New Boss
****** IMAGE: SEBE4299.00001.003
CAPTION: Illustration 3
Fabricate A New Boss