Implement Relief Pressure Test (Using Pressure Gauge)
The implement relief pressure test should be done if a
problem is suspected with the implement relief valve.
3
4
NOTE: When conducting the Implement Relief Pres-
sure Test, use a 5000 PSI (350 Bar) Pressure Gauge.
1.
Perform steps 1 through 8 of the Charge Pressure
Test (see Test No. 1 in this section). Make sure to use a
PSI (350 Bar) Pressure Gauge.
2
2
5000
2.
With the engine running at 3200 RPM, move the lift
1
control lever to the RAISE position and allow the cutting
unit (or implement) to fully raise. Continue to hold the le-
ver in the RAISE position and observe the pressure
gauge. The pressure reading should be from 700 to
Figure 18
1.
2.
Seat base opening
Check valve
3.
4.
Pipe plug
Implement relief valve
1000
PSI(48.2to69.0bar)astheimplementreliefvalve
lifts.
3.
lower the cutting deck (or implement) to the ground.
Shut off engine. Record test results.
Move the lift control lever to the LOWER position to
RELIEF
VALVE
FRONT
NOTE: If the implement relief pressure is 700 to 1000
PSI (48.2 to 69.0 bar) and a steering or lift problem oc-
curs,inspectforaproblemunrelated tothehydraulic cir-
cuit (e.g. binding steering or lift system components,
debris build--up on/under the cutting deck). Check and
repairotheritemsbeforecontinuingwithhydraulictests.
4.
(48.2
If the implement relief pressure is below 700 PSI
bar), adjust the implement relief valve in the trans-
mission by adding the required amount of shims from
theshimpack(seeImplementReliefValveintheSauer--
Danfoss (Sundstrand) 15 Series Service Manual at the
end of this chapter).
Figure 19
NOTE: For every 0.010 in. (.254 mm) of shim thick-
ness, there is an approximate 50 PSI (3.4 bar) change
in implement relief pressure.
If adding shims to the relief valve does not increase
pressure, inspect the condition of the charge pump ger-
otor and internal housing (See Charge Pump Service in
the Sauer--Danfoss (Sundstrand) 15 Series Service
Manual at the end of this chapter).
If the charge pump is in good condition (no scoring,
scratches or excessive wear), the general condition of
the transmission’s piston pump and piston motor might
be suspected of wear and inefficiency. A lack of mini-
mum implement relief pressure could be due to the
charge pumphaving todirect allflow tothe maintraction
circuit (piston pump and piston motor).
5.
Install pipe plug back in the transmission. Check hy-
draulic oil level in reservoir (front axle).
Disconnect pressure gauge from the transmission.
Groundsmaster 3280--D/3320
Page 5 -- 21 Rev. A
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro Groundsmaster 3280 D, Toro Groundsmaster 3320 |
| 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)