Gradall 534B (9020-7317) Service Manual - Manual (Page 92)

GRADALL LOED MATERIALS HANDLER 534B SYSTEM OPERATION
T I LT & C O M P E N S AT I N G C I R C U I T S
The tilt circuit raises or lowers the angle of the fork
or other attachment a total of 114°. It is a dual
circuit combining with a compensating cylinder to
automatically adjust the level of the fork
continuously as the boom is raised or lowered.
Movement of the tilt control lever (sway) forward or
backward adjusts the angle of the attachment.
Forward lowers the fork and backwards raises the
fork
Oil from the Tilt Control Valve section is routed to
both cylinders. The compensating cylinders a plain
cylinder and the tilt cylinder uses the counter-
balance valve.
Both cylinders are of a identical size so that as the
boom angle changes, a like volume of oil is
transfered to or from the tilt cylinder, keeping the
fork level or in the same position.
The 534B-6 models 4" cylinders are used and on the
534B-8 models 5" cylinders are used.
The oil lines which are used to carry the oil thru the
boom pass around the rear sheaves on the push
boom assembly.
The oil lines are secured to the front end of the 3rd
boom section with spring to keep them tight.
16
OIL COOLER CIRCUIT
To help keep the temperature of the hydraulic oil to
a nominal level, various circuits on the machine
dump oil thru a heat exchanger radiator located in
back of the engine radiator.