2013/12/19 Caterpillar

Electric Power Generation:

C27 (S/N: R8W1-UP)

Generator Set:

C27 (S/N: DWB1-UP; GDS1-UP)

C32 (S/N: K7C1-UP; JSJ1-UP; JAZ1-UP; RNE1-UP; RNX1-UP)

Industrial Engine:

C27 (S/N: TWM1-UP)

C32 (S/N: TLD1-UP)

Marine Engine:

C32 (S/N: RNC1-UP; RSD1-UP; RPM1-UP; SDN1-UP; RNR1-UP; T3T1-UP; RNY1-UP; RNZ1-UP; RNF1-UP; DSJ1-UP; RTK1-UP)

Petroleum Engine:

C32 (S/N: B2C1-UP; SMP1-UP)

Petroleum Power Train Package:

C27 (S/N: 1271-UP)

C32 (S/N: 1321-UP; PEF1-UP; PEK1-UP)

TH48-E70-C27I (S/N: PKZ1-UP)

TH48-E70-C32I (S/N: PKY1-UP)

TH48-E70-C32P (S/N: PKG1-UP)

Engine News SEBD9920, 19 December 2013, "A New Valve Cover Base Is Now Used on Certain C27 and C32 Engines". The original article was revised to update the parts list.

Description of Change: The new valve cover base has injector harness fastening points. The new wiring harnesses have improved connectors and wire.

Adaptable To: The new valve cover base and wiring harness replace the existing.

The new parts and former parts are listed in Table 1.

Table 1

New Part	Former Part
435-8537 Engine Harness As with Brakes	292-9253 Engine Harness As with Brakes
435-8538 Engine Harness As without Brakes	285-6647 Engine Harness As without Brakes
442-5727 Valve Cover Base	222-6953 Valve Cover Base

The new 442-5727 Valve Cover Base, 435-8537 Engine Harness As, and 435-8538 Engine Harness As are adaptable to the above engines back to first production.

New brackets were introduced to utilize the former 222-6953 Valve Cover Base .

The former 222-6953 Valve Cover Base is canceled.

Illustration 1	g03510476
(1) Wiring harness (2) 326-4512 Cable Tie Mounting

Illustration 2	g03510484
(1) Wiring harness (3) 123-3202 Cable Strap (4) 442-5727 Valve Cover Base

Illustration 3	g03510485
Typical 442-5727 Valve Cover Base (1) Wiring harness (2) 326-4512 Cable Tie Mounting (3) 123-3202 Cable Strap

Note: The mounting and fastening locations for the valve cover bases are the same for both brake and non-brake harnesses.

Parts Needed

Table 2

Qty	Part
3	2D-6235 Locknut
3	8T-4205 Hard Washer
6	123-3202 Cable Strap
6	326-4512 Cable Tie Mounting
1	435-8537 Engine Harness As (With Brakes)
1	435-8538 Engine Harness As (Without Brakes)
2	444-2472 Bracket As
1	444-2473 Bracket As

Rework Procedure

Illustration 4	g03507546
Typical 222-6953 Valve Cover Base (1) 444-2473 Bracket As (2) 444-2472 Bracket As

Illustration 5	g03507547
(2) 444-2472 Bracket As (3) 8T-4205 Hard Washer (4) 2D-6235 Locknut

Note: The 100-5218 Clip, the 100-5219 Clip, and the associated hardware will still be utilized.

1. Install one bracket (1) onto the 222-6953 Valve Cover Base with one washer (3) and one locknut (4). Refer to Illustration 4 for the correct location of the bracket.

2. Install two brackets (2) onto the 222-6953 Valve Cover Base with one washer (3) and one locknut (4) per bracket. Refer to Illustration 4 for the correct location of the brackets.

Show/hide table



Illustration 6	g03510098
(1) 444-2473 Bracket As (2) 444-2472 Bracket As (5) 123-3202 Cable Strap

3. Secure the wiring harness to brackets (1) and (2) with two cable straps (5) per bracket.

The change is effective with engine serial numbers on or after 11December 2013.