2014/02/28 Caterpillar

Improved Cab Heater Group, with Improved Water Valve and New Heater Box Access Panels to Improve Serviceability, Is Now Used on Certain Pipelayers, Track-Type Loaders, and Track-Type Tractors {7304, 7320}

Usage:

D6K LGP DHA

Pipelayer: PL61 (S/N: WGS1-UP)
Track-Type Loader: 953D (S/N: LBP1-UP) 963D (S/N: LCS1-UP) 973D (S/N: LCP1-UP)
Track-Type Tractor: D3K2 (S/N: GAE1-UP; KFF1-UP; KLL1-UP) D3K (S/N: LLL1-UP; FFF1-UP; JTD1-UP) D4K2 (S/N: KMM1-UP; KRR1-UP) D4K (S/N: RRR1-UP; MMM1-UP) D5K2 (S/N: TRF1-UP; KWW1-UP; KYY1-UP) D5K (S/N: YYY1-UP; WWW1-UP; JLF1-UP) D6K2 (S/N: RST1-UP; WMR1-UP) D6K (S/N: HMG1-UP; FBH1-UP; NCF1-UP; DHA1-UP)

Description of Change: A new water valve group for the cab heater group is now used on the machines listed above. The new water valve group with increased length of water valve tube provides proper hose engagement which increases the service life of heater group. Also new plate assemblies are used to improve access to components inside the air conditioner group.

Adaptable To:

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Table 1
Parts List
Item	Qty	New Part Number	Description	Former Part Number
1	1	428-7410	Plate As	277-7713
2	1	428-7409	Plate As	277-9966
3	2	235-9014	Spring Clamp	8T-0154
4	1	420-3511	Water Valve Gp	277-9968

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Illustration 1	g03625156

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Illustration 2	g03613876
Typical example Air conditioner group

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Illustration 3	g03613877
View A Cab heater group

New 420-3511 Water Valve Gp (4) replaces the former 277-9968 Water Valve Gp in the cab heater group. The cab heater group is a part of air conditioner group. Use new parts that are listed in Table 1 while updating the cab heater group.

The improved cab heater group is adaptable to machines and effective in production with machines that are listed in Table 2.

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Table 2
Sales Model	Adaptable to Machines	Effective in Production with Machines
PL61	S/N:WGS1-541	S/N:WGS542-UP
953D	S/N:LBP1-1613	S/N:LBP1614-UP
963D	S/N:LCS1-2168	S/N:LCS2169-UP
973D	S/N:LCP1-360	S/N:LCP361-UP
D3K2	S/N:GAE1-172	S/N:GAE173-UP
	S/N:KLL1-354	S/N:KLL355-UP
	S/N:KFF1-263	S/N:KFF264-UP
D3K	S/N:LLL1-1682	S/N:LLL1683-UP
	S/N:JTD1-175	S/N:JTD176-UP
	S/N:FFF1-1120	S/N:FFF1121-UP
D4K2	S/N:KRR1-320	S/N:KRR321-UP
D4K2	S/N:KMM1-348	S/N:KMM349-UP
D4K	S/N:RRR1-801	S/N:RRR802-UP
D4K	S/N:MMM1-1008	S/N:MMM1009-UP
D5K2	S/N:KYY1-737	S/N:KYY738-UP
	S/N:TRF1-198	S/N:TRF199-UP
	S/N:KWW1-569	S/N:KWW570-UP
D5K	S/N:JLF1-516	S/N:JLF517-UP
	S/N:YYY1-2006	S/N:YYY2007-UP
	S/N:WWW1-2166	S/N:WWW2167-UP
D6K2	S/N:RST1-443	S/N:RST444-UP4
D6K2	S/N:WMR1-335	S/N:WMR336-UP6
D6K	S/N:DHA1-2395	S/N:DHA2396-UP
	S/N:FBH1-2738	S/N:FBH2739-UP
	S/N:HMG1-204	S/N:HMG205-UP
	S/N:NCF1-UP	-