2000/08/28 Caterpillar

Backhoe Loaders:

416C (PIN: 1WR1-UP)

426C (PIN: 1MR1-UP; 1YR1-UP)

436C (PIN: 1PR1-UP; 2AR1-UP)

Service Magazine, SEPD0539, 28 August 2000, "A New Check Valve Reduces Voiding". Disregard this article. See the article that follows.

Description of Change: A new check valve assembly is available. The new check valve improves the performance of the parallel lift loader during dump operation with a heavy load.

Adaptable To: The new 195-4974 Check Valve replaces 6V-8639 Connector and seals. The new check valve is effective with the following machines in Table 1.

Table 1

Effectivity of the 195-4974 Check Valve
Model	Product Identification Number
416C	PIN: 1WR10568
426C	PIN: 1YR2164
	PIN: 1MR1178
436C	PIN: 1PR1816
	PIN: 2AR1872

The new check valve is adaptable to all earlier machines with parallel lift.

Illustration 1	g00730640
(1) 195-4974 Check Valves

Remove the 6V-8639 Connectors and seals at the rod end port of the tilt cylinders. Install the new 195-4974 Check Valves at the rod end port of the tilt cylinders.