TM 9-2320-272-10
1-21.
HYDRAULIC SYSTEM OPERATION (Contd)
A
TRANSMISSION POWER TAKEOFF (PTO) CONTROL - A manually operated control lever located inside the
vehicle cab that permits engagement or disengagement of the transmission Power Takeoff (PTO).
B
TRANSMISSION POWER TAKEOFF (PTO) - Uses driving power of the transmission to provide mechanical
driving power for the hydraulic pump.
C
POWER TAKEOFF (PTO) DRIVE SHAFT - Transmits mechanical driving power from the PTO to the hydraulic
pump.
D
HYDRAULIC PUMP - Driven by the PTO drive shaft, it draws oil from the oil reservoir through hydraulic hoses,
then pressurizes and directs it to the control valve.
E
HYDRAULIC OIL RESERVOIR - Storage tank for hydraulic oil.
F
DUMP BODY SAFETY LATCH - Hydraulically-operated in conjunction with the dump body control lever, the
safety latch locks the dump body in the lowered position and releases it when the control lever is pulled back to the
raised position.
G
DUMP BODY CYLINDER ASSEMBLY - Consists of two piston-type hydraulic cylinder hoists. Assembly raises
and lowers dump body with hydraulic oil, forcing the cylinder upward or downward.
H
OIL FILTER - Filters used or bypassed oil from the control valve before it returns to the hydraulic oil reservoir.
I
CONTROL VALVE - Four-port valve accepts pressurized oil from the hydraulic pump and directs oil pressure flow
from control valve to the hydraulic cylinders. It also directs oil returning from the hydraulic cylinders back to the
hydraulic oil reservoir.
J
DUMP BODY CONTROL LEVER - An operator control that determines the hydraulic oil pressure flow from control
valve to the hydraulic cylinders. The route this oil takes will determine whether the dump will raise or lower.
K
CONTROL LINKAGE Connects dump body control lever inside cab to the control valve.
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