2013/07/11 Caterpillar

OEM:

CAT WDS (S/N: M6J1-UP)

Off-Highway Truck:

770G (S/N: RMA1-UP; TWA1-UP; RMD1-UP; KDH1-UP; ECM1-UP)

772G (S/N: TWB1-UP; RME1-UP; RMH1-UP; LTS1-UP; KEX1-UP)

773F (S/N: EED1-UP; EXD1-UP)

777D (S/N: DCB1-UP; AGC1-UP; FKR1-UP; 3PR1-UP; 2YW1-UP)

777D HAA (S/N: AGY1-UP)

777D (S/N: 6XZ1-UP)

777F (S/N: WTK1-UP; JRP1-UP; JXP1-UP)

777G (S/N: T5A1-UP; TNM1-UP; RDR1-UP; T4Y1-UP)

Quarry Truck:

773G (S/N: MWH1-UP; JWS1-UP; T5S1-UP; T5T1-UP)

775D (S/N: 6KR1-UP; 8AS1-UP)

775F (S/N: EYG1-UP; DLS1-UP)

775G (S/N: T5F1-UP; RFM1-UP; MJS1-UP; T5W1-UP)

Service Magazine, SEPD1622, 13 June 2013, "A New Relief Valve Group for the Control Valve Group is Now Used on Certain Off-Highway Trucks". Disregard this article, refer to the article that follows.

Description of Change: The new hoist relief valve group better maintains pressure settings.

In case of slow or non-movement of the truck box, check the relief valve group (raise) pressure setting and readjust the pressure as required. If readjusting the pressure setting does not resolve the problem, replace the valve with new raise hoist relief valve.

Adaptable To:

Illustration 1	g03357089
245-1668 Control Valve Gp

Illustration 2	g03357090
245-1669 Control Valve Gp

The new relief valve group and the former relief valve group are listed in Table 1.

Table 1

Item	Qty	New Part Number	Description	Former Part Number
1	1	422-4594	Relief Valve Group	106-7372
2	1	416-8724	Relief Valve Group	148-2963
3	1	423-0466	Relief Valve Group	148-2962

The new relief valve groups are part of the control valve group. The new relief valve groups are adaptable to the machines and effective in production with the machines that are listed in Table 2.

Table 2

Sales Model	Adaptable to the machines	Effective in production with the machines
770G	S/N:ECM1-173	S/N:ECM174-UP
	S/N:KDH1-204	S/N:KDH205-UP
	-	S/N:RMA1-UP
	-	S/N:RMD1-UP
	-	S/N:TWA1-UP
772G	S/N:KEX1-104	S/N:KEX105-UP
	S/N:LTS1-270	S/N:LTS271-UP
	-	S/N:RME1-UP
	-	S/N:RMH1-UP
	-	S/N:TWB1-UP
773F	S/N:EED1-1369	S/N:EED1370-UP
	-	S/N:EXD1-UP
773G	S/N:JWS1-225	S/N:JWS226-UP
	S/N:MWH1-285	S/N:MWH286-UP
	S/N:T5S1-115	S/N:T5S116-UP
	S/N:T5T1-1	S/N:T5T2-UP
775D	-	S/N:6KR1-UP
	-	S/N:8AS1-UP
775F	S/N:DLS1-1560	S/N:DLS1561-UP
	-	S/N:EYG1-UP
775G	S/N:MJS1-355	S/N:MJS356-UP
	S/N:RFM1-501	S/N:RFM502-UP
	S/N:T5F1-1	S/N:T5F2-UP
	S/N:T5W1-109	S/N:T5W110-UP
777D	S/N:FKR1-2027	S/N:FKR2028-UP
	-	S/N:2YW1-UP
	-	S/N:3PR1-UP
	-	S/N:6XZ1-UP
	-	S/N:AGC1-UP
	-	S/N:AGY1-UP
	-	S/N:DCB1-UP
777F	S/N:JRP1-3340	S/N:JRP3341-UP
	-	S/N:JXP1-UP
	-	S/N:WTK1-UP
777G	S/N:RDR1-250	S/N:RDR251-UP
	S/N:TNM1-628	S/N:TNM629-UP
	S/N:M6J1-113	S/N:M6J114-UP
	S/N:T4Y1-159	S/N:T4Y160-UP
	S/N:T5A1-115	S/N:T5A116-UP