Wacker Neuson 28Z3, Service Manual

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SHB 28Z3 EN – Edition 2.0 * 28z3s210.fm
2-3
Specifications
Engine capacities
Engine tightening torques
2.3 Hydraulic system
Work hydraulics
Capacities
Model 28Z
3
Fuel tank
36 l (9.5 gal)
Engine oil
3.4 l (0.9 gal) (up to max. mark)
1.8 l (0.48 gal) (up to min. mark)
Coolant (without radiator)
0.9 l (0.24 gal) (engine only)
Radiator
4.5 l (1.19 gal)
Expansion tank
0.5 l (0.13 gal)
Tightening torques
Model 28Z
3
Cylinder-head bolt
1
1. Screw must be oiled
54 – 58 Nm (M9x1.25) (40 – 43 lbs/ft)
Connecting rod bearing screw
1 22.6 – 27.5 Nm (M7x1.0) (16.6 – 20.3 lbs/ft)
Main bearing screw
75.5 – 81.5 Nm (M10x1.25) (55.7 – 60 lbs/ft)
Flywheel screw
80.4 – 86.4 Nm (M10x1.25) (59.3 – 63.7 lbs/ft)
Hydraulics
Model 28Z
³
Pump
Double variable displa twin gear pump
11.5 + 11.5 + 8 + 2.7 cm³
(0.70 + 0.70 + 0.48 + 0.16 cu. in.)
Flow rate
30.80 + 30.80 + 21.40 + 7.2 l/min at 2500 rpm
8.1 + 8.1 + 5.7 + 1.9 gal/min at 2376 rpm
Operating pressure for work and
drive hydraulics
225 bar (3263 psi)
Swivel unit operating pressure
206 bar (2987 psi)
Hydraulic oil radiator
Standard
Hydraulic oil tank capacity
30 l (7.9 gal)
Hydraulic oil quantity (system fill)
42 l (11 gal)
Work hydraulics
Model 28Z
³
Max. operating pressure
225
+/-3
bar (3263
+/- 43.5
psi)
Main pressure limiting valve
for boom/bucket/stick
225
+/-3
bar (3263
+/-43.5
psi)
Main pressure limiting valve
for stabiliser blade
206
-4/+2
bar (2988
-58/+29
psi)
Main pressure restriction for pilot control pres-
sure
30
-0/+4
bar (435
-0/+58
psi)
Main pressure restriction for swivel drive
(hydraulic motor pressure restriction)
200
-4/+2
bar (2901
-58/+29
psi)
Filter
Return filter