Toro 98957SL Rev B Sand Pro 2020 3020 5020 Service Manual

Procedure for Traction Pump Flow (P1) (Fig.12):
Make sure hydraulic oil is at normal operating tem-
5.   Operate engine at full speed (3150 + 50 RPM).
1.
perature by operating the machine for approximately 10
minutes.
CAUTION
2.
attachments removed. Make sure engine is off.
Make sure machine is parked on a level surface with
Use extreme  caution when  taking gauge  read-
ings. The tires off the ground will be spinning.
3.
4.
Read Precautions for Hydraulic Testing.
6.
position.
Slowly  push traction  pedal  into the  fully  forward
Make sure that traction pedal is adjusted to the neu-
tral and forward positions (see Adjust Traction Pedal for
Neutral and Forward).
7.
Slowly close flow control valve on tester until pres-
sure gauge on the hydraulic tester reads 1700 PSI. As
flow control valve is being closed, engine speed will de-
crease  to  approximately   2200  RPM  (verify   engine
speed with a phototac).
WARNING
8.
mum flow of 7.5 GPM (28.4 LPM). Record test results.
Observe flow gauge. Tester reading should be mini-
Before jacking up the machine, review and follow
Jacking Instructions in Chapter 1 – Safety.
9.
tester, and turn off machine.
Release traction pedal, open flow control valve on
1.
wheels to spin freely and to allow hydraulic flow through
the traction circuit:
Jack  up  machine  as  follows  to  allow  the  drive
10.
If 1700 PSI (tester pressure), 2200 RPM (engine
speed), or 7.5 GPM flow cannot be achieved, consider
the following:
A.  On the SP 2020, jack up both rear wheels. Sup-
port machine with blocks or jack stands so that both
rear wheels are off the ground.
A.  The traction pedal and traction speed may need
adjustment (see Adjust  Traction Pedal for Neutral
and Forward).
B.  On the SP 3020 and SP 5020, jack up both rear
wheels and the front wheel. Support machine with
blocks or jack stands so that all three wheels are off
the ground.
B.  If the  engine speed  drops excessively  (below
2200
RPM) as the traction pump load is applied, en-
gine performance should be evaluated (see Chap-
ter 3 – Briggs & Stratton Vanguard Engines).
2.
lic tester (flow meter).
Disconnect hydraulic connections to install hydrau-
C. If engine speed does not drop and pressure and
flow specifications are not met, the hydrostat needs
to be repaired or replaced as necessary.
A.  On the SP  2020/3020, disconnect left  hose at
the forward header.
B.  On the SP 5020, disconnect bottom hose at the
front wheel motor.
11.
exists, check wheel motor efficiency (see TEST NO. 4:
Wheel Motor Efficiency in this section).
If specifications are met and traction circuit problem
3.
Install hydraulic tester (flow meter). Make sure the
flow control valve is fully open.
12.
If testing is complete, lower  wheels to the ground.
Remove hydraulic tester and reconnect hydraulic hose.
A.  On the SP 2020/3020, make sure the flow arrow
points  out of  the  hydrostat and  into  the  forward
header.
13.
Make sure hydraulic tank is full (see Check Hydrau-
lic System Fluid).
B.  On the SP 5020, make sure the flow arrow points
from the hose and into the bottom port of  the front
wheel motor.
4.
After installing hydraulic tester, start engine and run
at idle speed. Check for hydraulic leakage and  correct
before proceeding with test.
Sand Pro 2020/3020/5020
Page 4 – 21
Hydraulic System (Rev. A)
Product Specification
CategoriesLawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals
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- 170 pages
Document TypeService Manual
LanguageEnglish
Product BrandToro. 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)
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Publishertoro.com
Wikipedia's PageToro Company
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