1997/09/29 Caterpillar

Bumper Spring Prevents Over Travel Of Handle For Pilot Valve Group{5059}

Usage:

520D (9YK),
522D (2WL) Skidders;
814F (9DM) Wheel Tractors;
815F (1GN) Soil Compactors;
914G (7ZM, 9WM),
918F (3TJ, 2CK),
924F (5NN, 6MN, 7PN),
928F (8AK, 2XL),
938F (1KM, 2RM, 7SN) Wheel Loaders;
IT14G (8ZM, 1WN),
IT18F (6ZF, 5EJ),
IT24F (4NN, 6KN),
IT28F (1JL, 3CL),
IT38F (6FN, 5DR) Integrated Toolcarrier

Description of Change: A new bumper spring (1) was added below pilot valve pivot plate (2) at plungers (3) for bucket dump (A) and lift lower/float (D).

The bumper spring prevents the hand control lever from inadvertently going beyond the "HOLD" or "NEUTRAL" position to the bucket "DUMP" or lift "LOWER" position, when rackback or raise kickouts are deactivated, or the operator releases the handle to return to "HOLD".

Adaptable To: The new 136-0902 Spring, added to 112-1847 and 112-9686 Pilot Valve Groups, was effective with first production for 914G (7ZM, 9WM) Wheel Loaders and IT14G (8ZM, 1WN) Integrated Toolcarriers.

The new spring is adaptable to first production for the following machines:

520D (9YK), 522D (2WL) Skidders;

814F (9DM) Wheel Tractors;

815F (1GN) Soil Compactors;

918F (3TJ, 2CK), 924F (5NN, 6MN, 7PN), 928F (8AK, 2XL), 938F (1KM, 2RM, 7SN) Wheel Loaders;

IT18F (6ZF, 5EJ), IT24F (4NN, 6KN), IT28F (1JL, 3CL),

IT38F (6FN, 5DR) Integrated Toolcarrier

Typical of 112-1847 and 112-9686 Pilot Valve Groups.

(1) New 136-0902 Spring-Bumper.

(2) 110-3775 Plate-Pivot.

(3) 110-6118 Plunger Assembly.

(A) Bucket (DUMP).

(B) Lift (RAISE).

(C) Bucket (RACKBACK). (D) Lift (LOWER/FLOAT).

Caterpillar Information System:

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