PRODUCT IMPROVEMENT PROGRAM FOR REPLACING THE 1970197 SPOOL FOR HYDRAULIC LOCK FUNCTION ON CERTAIN 312C, 315C, 318C, 320C, 321C, 322C, 325C AND 330C EXCAVATORS Caterpillar

PRODUCT IMPROVEMENT PROGRAM FOR REPLACING THE 1970197 SPOOL FOR HYDRAULIC LOCK FUNCTION ON CERTAIN 312C, 315C, 318C, 320C, 321C, 322C, 325C AND 330C EXCAVATORS

Usage:

SEBE9037-01

January 16, 2005
(Revised April 2005)
U-20
A-15
D-16
O-18

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*Safety*	PRODUCT IMPROVEMENT PROGRAM FOR REPLACING THE 1970197 SPOOL FOR HYDRAULIC LOCK FUNCTION ON CERTAIN 312C, 315C, 318C, 320C, 321C, 322C, 325C AND 330C EXCAVATORS
1327		PI10355

NOTE: This Program must be administered as soon as possible. When reporting the repair, use "PI10355" as the Part number and "7751" as the Group Number, "56" as the Warranty Claim Description Code and "T" as the SIMS Description Code. Exception: If the repair is done after failure, use "PI10355" as the Part Number, "7751" as the Group Number, "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.

NOTE: This Revised Service Letter replaces the January 16, 2005 Service Letter. Changes have been made to the Rework Procedure.

PROBLEM

NOTE: The 1970197 Spool is located in the 1970198 Selector Valve Group. The 1970198 Valve Group is located in the 1588251 Selector Valve Group. The 1970197 Spool for hydraulic lock function needs to be replaced on certain 312C, 315C, 318C, 320C, 321C, 322C, 325C and 330C Excavators. The 1970197 Spool in the 1970198 Valve Group may break. Spools manufactured between May 26, 2004 and June 7, 2004 may break due to an improper chucking method during the machining process.

AFFECTED PRODUCT

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Model	Identification Number
312C L	CBA1991-2018
315C	CJC1550-1588
318C	MDY335-343 GPA313-314
320C	AMC4303-4331 PAB2526-2628 TBR180 SAH296-300
320C L	ANB3942-3962
320C LRR	PAC529-535
321C LCR	MCF384-396
322C	DAA168-169 FED227-229
325C	BKW279
325C L	BMM478-481
330C	JAB691-700 KDD742-743, 745, 747, 749, 750, 752

PARTS NEEDED

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Qty	Part Number	Description
1	2597434	Spool

ACTION REQUIRED

Remove the former 1970197 Spool for hydraulic lock function in the 1970198 Valve Group. Install a new 2597434 Spool.

OWNER NOTIFICATION

U.S. and Canadian owners will receive the attached Owner Notification.

SERVICE CLAIM ALLOWANCES

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Caterpillar		Dealer Suggested		Customer Suggested
Parts	Labor Hrs.	Parts	Labor Hrs.	Parts	Labor Hrs.
100%	3.0	0	0	0	0
NOTE: This is a 3.0- hour job. NOTE: U.S. and Canadian Dealers Only ? Eligible dealers may enter a Type 2 SIMS Report

PARTS DISPOSITION

Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.

MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.

Attach. (1-Owner Notification)
(2-Rework Procedure)

COPY OF OWNER NOTIFICATION FOR U.S. AND CANADIAN OWNERS

XYZ Corporation
3240 Arrow Drive
Anywhere, YZ 99999

SAFETY ? Replace The Spool For Hydraulic Lock Function

MODELS INVOLVED ? 312C, 315C, 318C, 320C, 321C, 322C, 325C and 330C Excavators

Dear Caterpillar Product Owner:

The spool for hydraulic lock function needs to be replaced on certain 312C, 315C, 318C, 320C, 321C, 322C, 325C and 330C Excavators. The spool in the selector valve group may break. Spools manufactured between May 26, 2004 and June 7, 2004 may break due to an improper chucking method during the machining process. A new spool needs to be installed on the products listed below. The spool may crack and malfunction causing personal injury or death. You will not be charged for the service performed.

Contact your local Caterpillar dealer immediately to schedule this service. The dealer will advise you of the time required to complete this service. Please refer the dealer to their Service Letter dated January 16, 2005 when scheduling this service.

We regret the inconvenience this may cause you, but urge you to have this service performed for your added safety and satisfaction.

Caterpillar Inc.

Identification #(s)

Attached to January 16, 2005 Service Letter

Rework Procedure

Review, understand, and follow all Warning and Safety related notices in the machine O&MM. Position the machine on level ground, with the stick perpendicular to the ground and the bucket bottom parallel to the ground. Lower the front linkage to remove the load from the boom cylinders. With the machine stabilized, shut the engine off. With the machine hydraulics unlocked, move the joysticks and pedals to completely relieve all circuits of hydraulic pressure. The machine is ready to be tagged "DO NOT OPERATE" and repairs made. When working within systems containing machine fluids, please be environmentally responsible.

Illustration 1

½ lb. hammer
ratchet-type wrench
8mm allen-type hex socket
Extension
8mm allen-type tee wrench

Illustration 2

Remove the cover. Refer to Illustration 2.

Illustration 3

The valve group to be reworked, and plug to be removed to access spool. Refer to Illustration 3.

NOTE: The following steps show spool replacement on a valve removed from the machine. This is done to show the replacement detail. The valve DOES NOT need to be removed from the machine to perform the rework.

Illustration 4

Illustration 5

The plug hex hole may be painted over. Use the allen-type tee wrench and the hammer to clear the paint. Loosen and remove the plug. Refer to Illustrations 4 and 5.

Illustration 6

To avoid damaging the valve port, carefully remove the former spool (197-0197) by pulling it straight out while holding it by the 9mm diameter. Refer to Illustration 6. Oil in the valve may leak out after the spool is removed.

Illustration 7

Clean up spilled oil from valve port and inspect valve port inside for signs of debris or contamination and remove accordingly. Coat new spool (259-7434) with thin film of oil and insert into the valve port head side of the spool with the cross hole first. Refer to Illustration 7.

Illustration 8

Test that the spool moves smoothly and returns to the neutral position by pressing the spool against the return spring several times.

WARNING: If the spool becomes jammed, or does not return to neutral, another spool, or other repairs may be needed.

Illustration 9

After confirming smooth spool movement, prepare to re-assemble the plug. Inspect the seal to ensure no cuts, dirt, or other debris is present. Likewise inspect the sealing surface on the valve port. When all is inspected and clean, carefully thread the plug into the port and torque to a 50 +/- 7 N.m value.
Re-position any lines in the vicinity of the valve body that may have been disturbed in order to avoid rubbing or fouling.
Replace the access cover.