4-M2
ZD321, ZD326, ZD331, WSM
HYDRAULIC SYSTEM
2. HYDRAULIC PUMP
The hydraulic pump is composed of the casing (1),
cover (3), side plate (5), and two spur gears (drive gear
(4) and driven gear (2)) that are in mesh.
Hydraulic pump is driven by the pump drive shaft in
the transmission case.
Maximum displacement is as follows.
W1013860
Displacement Engine speed Condition
21.0 L/min.
5.5 U.S.gals/min.
4.6 Imp.gals/min.
ZD321, ZD326 :
At 3200 min
-1
(rpm)
ZD331 :
At 3000 min
-1
(rpm)
at no load
(1) Casing
(2) Driven Gear
(3) Cover
(4) Drive Gear
(5) Side Plate