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Reference
Only
TROUBLESHOOTING
999 SERVICE/MAINTENANCE MANUAL
10-54
Published 05-16-17, Control # 233-03
Test 22 – Checking Hydraulic Brake Pressure
The swing brake, swing lock and travel brakes operate off
rear drum low-pressure charge pump pressure. The front
drum brake, rear drum brake, and boom hoist brake operate
off low-pressure side of each closed-loop system. The
auxiliary drum brake operates off auxiliary low-pressure
charge pump pressure.
To check hydraulic brake pressures for swing and travel
systems:
•
Engine must be off and power off, with all brakes and
locks engaged.
•
Disconnect a rear drum charge pressure line.
•
Connect a 0 – 1,000 psi (69 bar) gauge with tee fitting in
charge pressure line.
•
Start engine and set throttle at high idle.
•
Enable test system brake and check that brake pressure
is 325 – 375 psi (22 – 26 bar). Charge pressure can also
be checked at system diagnostic screen.
•
If pressure is not within range, adjust rear drum charge
pressure (see Test 18).
•
Remove pressure gauge and replace the charge
pressure line.
To check hydraulic brake pressure for front drum, rear drum,
or boom hoist system:
•
Engine must be off and power off, with all brakes
engaged.
•
Connect a 0 – 1,000 psi (69 bar) gauge at diagnostic
gauge coupler on loop flushing valve.
•
Start engine and set throttle at high idle (2,000 rpm).
•
Enable test system brake and check that brake pressure
is 325 – 375 psi (22 – 26 bar). Charge pressure can also
be checked at system diagnostic screen.
•
If pressure is not within range, check system charge
pressure (see Test 18).
•
Remove pressure gauge from diagnostic gauge coupler.
To check hydraulic brake pressure for auxiliary drum system:
•
Engine must be off and power off, with all brakes
engaged.
•
Connect a 0 – 1,000 psi (69 bar) gauge at test port on
auxiliary filter
manifold.
•
Start engine and set throttle at high idle (2,000 rpm).
•
Enable auxiliary drum brake and check that brake
pressure is 325 – 375 psi (22 – 26 bar). Charge pressure
can also be checked at system diagnostic screen.
•
If pressure is not within range, check system charge
pressure (see Test 18).
•
Remove pressure gauge from test port on auxiliary filter
manifold.
Item
Description
1
Diagnostic Gauge Coupler
2
Loop Flushing (purge) Valve
3
Brake Solenoid Valve
1
P1603
2
3
Содержание 999
Страница 1: ...R e f e r e n c e O n l y Service Maintenance Manual Manitowoc 999 ...
Страница 2: ...R e f e r e n c e O n l y ...
Страница 4: ...R e f e r e n c e O n l y THE ORIGINAL LANGUAGE OF THIS PUBLICATION IS ENGLISH ...
Страница 173: ...R e f e r e n c e O n l y Manitowoc Published 05 16 17 Control 233 03 4 19 999 SERVICE MAINTENANCE MANUAL BOOM 4 ...
Страница 174: ...R e f e r e n c e O n l y BOOM 999 SERVICE MAINTENANCE MANUAL 4 20 Published 05 16 17 Control 233 03 ...
Страница 297: ...R e f e r e n c e O n l y ...
Страница 298: ...R e f e r e n c e O n l y ...