Toro 92801SL Rev I Groundsmaster 300 Series Groundsmaster 328 D Service Manual

TEST NO. 1: Charge Pressure (Fig. 9)
Using a low pressure gauge: 0 - 1000 psi
NOTE:  If  adding shims  to  the  relief  valve does  not
increase  the  pressure,  inspect  the  condition  of  the
charge pump gerotor and internal housing.
1.
Engage the parking brake, and block the front wheels
to prevent movement of the machine. Lower the cutting
unit or implement to the floor and turn the engine OFF.
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.
2.
3.
Raise and support the seat.
Place a drain pan under the transmission. Use a 3/16
inch  Allen wrench  to  remove the  1/8  inch pipe  plug
located next the implement pressure port on top of the
transmission.
A lack of minimum charge pressure or low flow could be
due to the fact that the charge pump is having to direct
all of  its flow to  the main traction  circuit (piston pump
and piston motor). When this occurs, oil pressure  may
not increase to the 70 - 150  psi pressure necessary to
open the charge relief  valve; therefore, no oil can flow
into the steering and implement circuit.
4.
Connect the 0 -  1000 psi hydraulic gauge hose into
the 1/8 inch pipe opening.
5.
Start the engine  and move the throttle to  SLOW so
that the engine idles. Use a tachometer to verify that the
engine is running  at 1500 ± 50  rpm. The engine must
idle at this speed to provide sufficent charge pump flow
and pressure to lubricate the internal parts of the trans•
mission.
6.
Allow the engine to run for  approximately 5 minutes
so  that  the  hydraulic  oil  reaches   normal  operating
temperature.
7.
Increase the engine speed to the FULLthrottle setting
and use a tachometer to verify that the engine is running
at 3200 ± 50 rpm.
8.
Observe the pressure measurement on the low pres•
sure gauge. The reading should be 70 - 150 psi.
NOTE: A  higher reading may  be obtained  due to  the
back pressure in the system. This is acceptable.
9.
If the pressure is below 70 psi, adjust the charge relief
valve by adding the required amount of shims from the
shim pack.
Figure 9
1.
Low pressure gauge (0 - 1000 psi)
Groundsmaster® 300 Series
Page 5 - 19
Testing
Product Specification
CategoriesLawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals
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- 402 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)
Canada 1-888-225-4886 USA 1-888-384-9939, Lawn Mower
Document File TypePDF
Publishertoro.com
Wikipedia's PageToro Company
CopyrightAttribution Non-commercial
(2 votes, average: 5 out of 5)
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Toro 92801SL Rev I Groundsmaster 300 Series Groundsmaster 328 D Service Manual SKU UPC Model
Michael on Nov 30, 2017. 34974

Need 328D. Manual pdf. Will rate after finding manual


barry on Feb 07, 2013. toro groundsmaster 322d

t has been a very reliable machine but getting parts is hard and not cheap to buy , generic parts has been cost effective and reliable , i am unable to get a wiring circut diagram for this unit as most problems are electrical problems


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