TM 10-3950-672-10
shutoff valve. A Grove-supplied fuel stainer (mounted on the right side frame rail behind the fuel tank) is located
in the fuel supply line.
e. Drive Train. The drive train consists of an automatic transmission and drive line. The automatic transmission is
a three-speed capable of providing automatic upshifts and downshifts through the three forward gear ratios. The
transmission features an internal filter accessed by removing the fluid sump pan.
The on-condition (OC) intervals for changing the transmission fluid and internal filter will be controlled (after the
warranty period), by the AOAP.
f. Axles. The front drive axle is manufactured by Rockwell. It is a single reduction, solid-mounted drive axle with
floating axle shafts and high traction differential.
The rear steer axle is a rigid-mounted, wide track axle and is manufactured by Grove.
g. Steering System. The crane incorporates a hydraulically controlled steering system, utilizing a hydraulic steer
cylinder mounted to the rear axle. A steering control valve directs flow from the hydraulic pump to the hydraulic
steer cylinder to provide full power steering of the rear axle.
h. Brake System. The service brakes are the hydraulic drum and floating shoetype and are installed on the front
and rear wheels. The park brake consists of a brake and shoe assembly bolted to the transmission. The parking
brake shoes are applied by pulling the cab-mounted lever. The lever pulls a cable attached to the brake cam.
The cam is rocked as the cable is pulled thus applying the brake shoes.
i. Hydraulic System and Components. The hydraulic system is designed to provide adequate pressure and
volume for simultaneous operation of various crane functions.
(1) Reservoir. The hydraulic reservoir is located on the right side of the crane chassis. The reservoir has a
total capacity of approximately 35 gal. (132.4 L) and a gauge level capacity of approximately 30 gal.
(113.5 L). The all-steel reservoir has an internally-mounted, full-flow filter and integral baffles that help
cool the oil and prevent oil foaming.
(2) Hydraulic Oil Cooler. The hydraulic oil cooler is mounted to the front of the crane under a bolt-on cover.
The oil cooler fan draws cool air through the cooling fins on the cooler. It cools the oil utilized in the swing
and telescope circuits.
(3) Pumps. The crane utilizes a two-section pump mounted on and driven by the engine to supply the
hydraulic system and a separate pump also driven by the engine to supply the steering system.
4-2
