2015/07/27 Caterpillar

Improved Check Valves Are Now Used On Certain Motor Graders {5051}

Usage:

12M B92

Motor Grader: 120MSeries 2 (S/N: M9C1-UP; M9H1-UP; R9N1-UP; R9W1-UP; M921-UP) 120M (S/N: R9A1-UP; B9C1-UP; R9C1-UP; D9W1-UP) 12MSeries 2 (S/N: F9B1-UP; F9M1-UP; R9P1-UP; R9S1-UP) 12MSeries 3 (S/N: N9B1-UP; N9F1-UP; N9P1-UP; N9R1-UP) 12M (S/N: R9B1-UP; B9F1-UP; B921-UP) 140MSeries 2 (S/N: M9D1-UP; R9G1-UP; M9J1-UP; R9M1-UP) 140MSeries 3 (S/N: N9D1-UP; N9G1-UP; N9J1-UP; N9M1-UP) 140M (S/N: B9D1-UP; D9G1-UP) 14L (S/N: B941-UP) 14M (S/N: R9J1-UP) 160MSeries 2 (S/N: M9E1-UP; M9K1-UP; R9L1-UP; R9T1-UP) 160MSeries 3 (S/N: N9E1-UP; N9K1-UP; N9L1-UP; N9T1-UP) 160M (S/N: B9E1-UP; D9T1-UP) 16M (S/N: R9H1-UP) 24M (S/N: B9K1-UP; B931-UP)

Description of Change: Improved implement check valves are now used on the machines listed above. The improved check valves use new O-rings that will prevent external oil leaks. The new O-rings have a larger cross section diameter of 2.95 mm (0.116 inch). The check valves are part of the implement control valve group.

Adaptable To: The improved 318-3115 Check Valve Gp, 321-6908 Check Valve Gp and 304-9654 Plug As are adaptable to and effective with the following machines in Table 1.

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Table 1
Sales Model	Adaptable to Machine	Effective in Production Machines
120M Series 2	(S/N: M9C1-535; M9H1-396; R9N1-198; R9W1-183; M921-107)	(S/N: M9C536-UP; M9H397-UP; R9N199-UP; R9W184-UP; M92108-UP)
120M	(S/N: R9A1-126; B9C1-1337; R9C1-110; D9W1-503)	(S/N: R9A127-UP; B9C1338-UP; R9C111-UP; D9W504-UP)
12M Series 2	(S/N: F9B1-220; F9M1-481; R9P1-199; R9S1-360)	(S/N: F9B221-UP; F9M482-UP; R9P200-UP; R9S361-UP)
12M Series 3	(S/N: N9B1-199; N9F1-383; N9P1-128; N9R1-161)	(S/N: N9B200-UP; N9F384-UP; N9P129-UP; N9R162-UP)
12M	(S/N: R9B1-127; B9F1-1497; B921-355)	(S/N: R9B128-UP; B9F1498-UP; B92356-UP)
140M Series 2	(S/N: M9D1-1844; R9G1-372; M9J1-952; R9M1-559)	(S/N: M9D1845-UP; R9G373-UP; M9J953-UP; R9M560-UP)
140M Series 3	(S/N: N9D1-486; N9G1-154; N9J1-325; N9M1-220)	(S/N: N9D487-UP; N9G155-UP; N9J326-UP; N9M221-UP)
140M	(S/N: B9D1-4717; D9G1-1581)	(S/N: B9D4718-UP; D9G1582-UP)
14L	(S/N: B941-134)	(S/N: B94135-UP)
14M	(S/N: R9J1-1624)	(S/N: R9J1625-UP)
160M Series 2	(S/N: M9E1-409; M9K1-425; R9L1-258; R9T1-349)	(S/N: M9E410-UP; M9K426-UP; R9L259-UP; R9T350-UP)
160M Series 3	(S/N: N9E1-110; N9K1-127; N9L1-118; N9T1-152)	(S/N: N9E111-UP; N9K128-UP; N9L119-UP; N9T153-UP)
160M	(S/N: B9E1-1132; D9T1-1434)	(S/N: B9E1133-UP; D9T1435-UP)
16M	(S/N: R9H1-991)	(S/N: R9H992-UP)
24M	(S/N: B9K1-662; B931-173)	(S/N: B9K663-UP; B93174-UP)

The 318-3115 Check Valve Gp and 321-6908 Check Valve Gp have an engineering change number of 02. The 304-9654 Plug As, 318-3036 Check and Relief Valve Gp, 318-3040 Check and Relief Valve Gp and 318-3052 Check and Relief Valve Gp have an engineering change number of 05.

Note: An engineering change number (Eng. Chg.) indicates effectivity of this improvement or adaptability to previous check valves. The Eng. Chg. can be found stamped on the valve cartridge.

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Table 2
Required Parts
Item	Qty	Part Number	Description
1	1	318-3115	Check Valve Gp
1	1	321-6908	Check Valve Gp
2	1	304-9654	Plug As
3	1	471-6294	O-Ring Seal
4	1	471-4231	Seal Kit

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Illustration 1	g03861588

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Illustration 2	g03867773
(1) Check valve group (A) Part number (B) Engineering change number

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Illustration 3	g03862010
(2) Plug assembly

Replace check valve group (1) and plug assembly (2) when a leak occurs at the port area.

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Illustration 4	g03867777

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Illustration 5	g03861596
(3) O-ring (A) Part number (B) Engineering change number (C) 318-3036 Check and Relief Valve Gp, 318-3040 Check and Relief Valve Gp and 318-3052 Check and Relief Valve Gp

If 318-3036 Check and Relief Valve Gp, 318-3040 Check and Relief Valve Gp and 318-3052 Check and Relief Valve Gp (C) have a leak at the port area, replace the existing 6V-5326 O-Ring Seal (2.62 mm (0.103 inch) cross section diameter) with a new O-ring (3) (2.95 mm (0.116 inch) cross section diameter) or replace the 325-2588 Seal Kit with seal kit (4) .