Procedure for Counterbalance Pressure Test
Make sure hydraulic oil is at normal operating tem-
perature by operating the machine under load for
approximately ten (10) minutes. Make sure the hydrau-
lic tank is full.
D. Tighten lock nut to secure adjustment. Check
counterbalance pressure and readjust as needed.
1.
9. When testing is completed, disconnect pressure
gauge from manifold test port. Install controller cover.
2.
decks lowered and off. Make sure engine is off and the
parking brake is applied.
Park machine on a level surface with the cutting
2
1
3
3.
Remove controller cover to gain access to lift/lower
manifold (Fig. 30).
4
CAUTION
Prevent personal injury and/or damage to equip-
ment. Read all WARNINGS, CAUTIONS and Pre-
cautions for Hydraulic Testing at the beginning
of this section.
RIGHT
4.
Determine system charge pressure (see Traction
Circuit Charge Pressure Test in this section).
FRONT
5.
counterbalance test port G2 on lift/lower manifold (Fig.
31).
Connect a 1000 PSI (70 bar) pressure gauge to
Figure 30
1.
2.
Controller cover
Screw (2 used)
3.
4.
Flat washer (2 used)
U--nut (2 used)
6.
(2870
Start the engine and put throttle at high idle speed
RPM) with noload onthe system. Do notengage
the cutting decks.
GAUGE READING TO BE 220 PSI (15.2 bar) over
system charge pressure (e.g. if charge pressure is
250
PSI (17.2 bar), counterbalance pressure should
5
be 470 PSI (32.4 bar)).
7.
8.
Stop engine and record test results.
Adjustment of the counterbalance valve can be per-
2
4
formed as follows:
1
NOTE: Do not remove the counterbalance valve from
the hydraulic manifold for adjustment.
3
A. Loosen lock nut on counterbalance valve (Fig.
31).
Figure 31
1.
2.
3.
Lift/lower manifold
Test port G2
Counterbalance valve
4.
5.
Lock nut
Adjusting screw
B. To increase pressure setting, turn the adjust-
ment screw on the valve in a clockwise direction. A
1/8
turnonthescrewwillmakeameasurablechange
in counterbalance pressure.
C. To decrease pressure setting, turn the adjust-
mentscrew onthevalve inacounterclockwise direc-
tion. A 1/8 turn on the screw will make a measurable
change in counterbalance pressure.
Groundsmaster 4000--D/4010--D
Page 4 -- 43
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro Groundsmaster 10176SL, Toro Groundsmaster 30446, Toro Groundsmaster 30448, Toro Groundsmaster 4010 D |
| Download File |
|
| Document Type | Catalog |
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
Canada 1-888-225-4886 USA 1-888-384-9939, Lawn Mower |
| Document File Type | |
| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
(0 votes, average: 0 out of 5)