SHB 28Z3 EN – Edition 2.0 * 28z3s312.fm
3-35
Maintenance
Pressure check of gear pump P3
Hydraulic supply for stabiliser blade, auxiliary hydraulics, boom swivel, upper carriage
rotation, optional 3rd control circuit
Checking primary pressure limiting valve 3 (PPLV 3)
☞
Connect a pressure gauge to measuring port MP 3
44/3
☞
Extend the stabiliser blade ram as far as it will go at maximum engine speed
☞
Check and make a note of the pressure value.
Checking pressure drop
☞
Extend the stabiliser blade ram as far as it will go at maximum engine speed
☞
Swiftly reduce engine speed from maximum to minimum -> pressure drop
☞
Check and make a note of the pressure value.
➥
Pressure drop should not be more than 10 % of the specified value
Setting primary pressure limiting valve 3 (PPLV 3)
☞
Adjust the pressure at the primary pressure limiting valve (PPLV 3)
45/C
on the main
valve block
☞
Slacken the locknut of the pressure limiting valve
☞
Unscrew the pressure limiting valve until you can read off a pressure drop on the
pressure gauge
➥
The valve seat may be stuck and must be slackened first
☞
Adjust the pressure limiting valve and tighten the locknut
☞
Check the primary pressure limiting valve 3 and the pressure drop once adjustment is
over
Also check with the retract stabiliser blade, boom swivel and upper carriage rota-
tion functions
Checking the auxiliary hydraulics pressure
Notice!
Factory indications for auxiliary hydraulics secondary valves are possibly invalid –
adapt these values to the attachment!
3
Fig. 44: Measuring port P3
Fig. 45: Primary pressure limiting valve 3
C
Содержание 28Z3
Страница 1: ...Service Manual Track excavator Machine model 28Z3 Edition 2 0 Language en Article number 1000178347...
Страница 10: ...I 8 SHB 28Z3 EN Edition 2 0 28Z3s20IVZ fm...
Страница 11: ...Operation...
Страница 27: ...Specifications...
Страница 46: ...2 20 SHB 28Z3 EN Edition 2 0 28z3s210 fm Specifications...
Страница 47: ...Maintenance...
Страница 113: ...Engine...
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Страница 132: ...4 20 SHB 28Z3 EN Edition 2 0 28z3s410 fm Engine...
Страница 133: ...Hydraulic system...
Страница 169: ...bersicht der Hydraulikpl...
Страница 174: ......
Страница 175: ...Electrical system...
Страница 184: ...6 10 SHB 28Z3 EN Edition 2 0 28z3s610 fm Electrical system...
Страница 185: ...Die Stromlaufpl ne und K Optionen...
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Страница 189: ...SHB 28Z3 EN Edition 2 0 28z3s612 fm 6 15 Electricalsystem Electrical sys tem Wiring harnesses overview...
Страница 199: ...SHB 28Z3 EN Edition 2 0 28z3s612 fm 6 25 Electricalsystem...
Страница 200: ...6 26 SHB 28Z3 EN Edition 2 0 28z3s612 fm Electrical system...
Страница 201: ...Options...
Страница 204: ...7 4 SHB 28Z3 EN Edition 2 0 28z3s710 fm Options Installation...
Страница 230: ...7 30 SHB 28Z3 EN Edition 2 0 28z3s710 fm Options...
Страница 231: ...PowerTilt PTS06...