2013/10/21 Caterpillar

Petroleum Power Train Package:

CX31-P600-C13I (S/N: PDJ1-UP; PDN1-UP)

CX31-P600-C18I (S/N: PDC1-UP)

Petroleum Transmission:

CX31-P600 (S/N: PFW1-UP)

Service Magazine SEPD1677, 09 October 2013, "Improved Case Assembly is Now used on CX31-P600 Petroleum Transmissions". Disregard this article. The correct information follows.

Description of Change: Modification to the existing case assembly or replacement is required to prevent bolt fractures.

Adaptable To: This change applies to the following models.

Table 1

Adaptable
Model	Adaptable S/N
C13	PDJ1-153
	PDN151-153
	PDN158
C18	PDC1
CX31	PFW143
	PFW300
	PFW302-303
	PFW322-325
	PFW331
	PFW336-337
	PFW342-344
	PFW346
	PFW359-360
	PFW367
	PFW370
	PFW373
	PFW377
	PFW381-382
	PFW384
	PFW396-397
	PFW400
	PFW411-412
	PFW416
	PFW426
	PFW438-439
	PFW441-442
	PFW444
	PFW453
	PFW481-486
	PFW496-500
	PFW524
	PFW534-580

Table 2

Effected
Model	Effected S/N
C13	PDJ154-Up
	PDN159-Up
C18	PDC2-Up
CX31	PFW581-Up

Introduction

This section describes how to perform modifications to the case assembly to prevent fatigue on the bolts.

Parts

Table 3

348-9901 Case
Item	Qty	Part Number	Description
1	17	155-6213	Oil
2	1	348-9900	Case As  (1)
3	23	8T-7929	Bolt
4	23	8T-7971	Hard Washer
5	23	9M-4355	Bolt Damper

( 1 )

This part is an alternative to machining the original case assembly. Ordering bolt dampeners is not required as case assembly comes with the bolt dampeners assembled.

Modification Procedure

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Illustration 1	g03453873

1. Machine the existing 348-9901 Case (23) bolt holes. These holes are currently 14 mm (0.55 inch) holes. Counter bore to 17.5 mm (0.69 inch), drilled 49 mm (1.93 inch) deep. Fully clean up parts, remove all machining chips.

2. Install bolt dampers (5) by hand.

3. Install the case assembly using bolts (3) and washers (4) .

4. Fill with oil (1) .

Note: Alternatively, case assembly (2) can be used. This assembly comes with the bolt dampeners assembled.