83400sl.pdf Groundsmaster 72/327/322-D

PART NO. 83400SL

Service Manual

Groundsmaster 72/327/322-D

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SPECIFICA TIONS Item Vickers Transmission

Sundstrand Transmission

Hydraulic Oil

Standard

Description Charge Relief Setting

25-50 psi (127-345 kPa) @ 3200 rpm

Implement Charge Relief Setting

450-500 psi (3103-3448 kPa) @ 3200 rpm

Traction Pressure Pump Input Speed (maximum) Motor Output Speed

3000-3500 psi (20685-24133 kPa) @ 3200 rpm 3200 ::t 100 rpm 0 - 3200 rpm

Pump Displacement

12.6 gal/min (47.9Umin) at 3200 rpm

IPump Input Speed (maximum) Motor Displacement

3200

:!:

100 rpm

Motor Output Speed

12.6 gal/min (47.9Umin) at 3200 rpm 0 - 3200 rpm

Max. Operating Pressure

3000 psi (20685 kPa)

Charge Pump Displacement Charge Relief Setting

4.6 gal/min (17.3L/min) @ 3200 rpm 70-150 psi (453-1034 kPa)

Max. Inlet Vacuum

5 in.hg. (16.9 kPa)

Max. Case Pressure

15 psi (103 kPa)

Implement Relief Setting

700-800 psi (4826-5516 kPa) at 3200 rpm

Sundstrand: Above 0 of (-18C)

Use API class SE-SF 10W30 or 10W40

Below O째F (-18C)

Use API class SE-SF 5W20 or 5W30 or Type A, Suffix A Automatic Transmission Fluid-Do Not Use "Dexron" fluid

Vickers: All Temperatures Lift Control Valve

Use API class SE-SF 10W40

Four way, four position, directional control Open center

2.50 (6.35cm) bore II

Lift Cylinder

3.25" (8.26cm) stroke

Oil Cooler

Lower tank of radiator

Reservoir

Differential Housing

5 Qt. (4.7L) Capacity

Oil Filter

Vickers application (Toro PIN 353-435)

10 micron screw-on type

Sundstrand application (Toro PIN 23-2300)

25 micron screw-on type

5.2

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5.8

PERIODIC MAINTENANCE One of the main reasons for selecting hydraulic systems for use in today's turf equipment is the ease of maintenance. By caring for the system using a regular maintenance program, you can eliminate common problems.

This section will explain how to keep the system maintained and at an optimum performance level.

However, these goals can only be reached when the mechanic understands and follows a good maintenance routine which consists of the following:

. Cleanliness is the prime concern when servicing hydraulic systems.

.

Never allow contaminents into the system.

. .

Keep all of the parts clean, Change the oil and filter regularly.

.

Keep your work area clean.

. Follow manufacturer's recommendations as to oils, filters, and adjustments.

.

Maintain good records.

.

Use common sense.

HYDRAULIC

transmissionoil before the engine is first started and daily thereafter. Refer to "Checking Oil Level" which follows.

CHECKING OIL LEVEL "VICKERS TRANSMISSION" 1. Position the machine on a level surface and stop the engine.

2. The level plug is located on the front side of the differential housing, just behind the large cutter deck counterbalance spring. Be sure the machine is on a level surface, and remove the level plug. The oil should be up to the bottom of the hole.

3. If the oil level is low, tilt the seat forward and remove the filler cap shown in Figure 4. Add a high quality SE-SF 10W40 oil until the level is up to the bottom of the check plug hole in the differential housinQ. IMPORTANT: When adding oil to the system, pour it through a funnel with a fine wire screen (200mesh or better). Keep the funnel and containers imma. culately clean. This procedure prevents accidental contamination of the hydraulic system.

SYSTEM OIL

The hydraulic system is designed to operate on any high-quality detergent oil having the American Petroleum Institute - API - "service classification" SE or SF. Oil viscosity - weight - must be selected according to the anticipated ambient temperature.

Temperature/viscosity recommendations are:

Sundstrand

A. Above O째F(-18째C) - Use SAE 10W30 or 10W40.

B.

Below O째F(-18째C) - SAE 5W20 or5W30, orType A, Suffix A Automatic Transmission Fluid.

Vickers

Use SAE 10W40 at all times.

NOTE: Do not mix engine oil and automatic transmission fluid; hydraulic system component damage may result.

The axle housing acts as the reservoir for the system. The transmission and axle housing are shipped from the factory with approximately 5 quarts (4.7L) of oil. However, check the level of

~.1n

Figure 4 "SUNDSTRAND TRANSMISSION" 1. Position the machine on a level surface and stop the engine.

2. Unscrew the dipstick cap (Fig. 5) from the filler neck and wipe it with a clean rag. Screw the dipstick cap finger-tight onto the filler neck. Unscrew the dipstick and check the level of the oil. If the level is not within 1/2 inch (13mm) from the groove in the dipstick (Fig. 5), add enough oil to raise the level to the groove mark. DO NOT OVERFILL by more than 1/2inch (13mm) above groove.

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PERIODIC MAINTENANCE 4. Remove the tube that connects the axle housing and transmission (Sundstrand), or the axle housing and filter (Vickers) and allow the oil to flow into a drain pan.

B

Tighten the nut finger tight until it bottoms against the seat (Fig. 8).

5. Fill the new hydraulic oil filter with fresh 10W30 or 10W40 oil and install the filter onto the bottom of the transmission or filter mounting pad.

6. Install the tube between the axle housing and transmission/filter mounting pad.

Figure 8

7. Fill the axle (reservoir) to the proper level; refer to "Checking Oil Level," page 10.

c.

8. Start the engine and operate at an idle for about 5 minutes. Turn the engine off.

With an ink pen or marker, mark a line lengthwise on the nut and adapter (See Fig. 8).

9. Allow the machine to sit for about 2 minutes.

After two minutes have passed, check the level of the oil in the axle. If the level is low, add oil to achieve the proper level. If the level is too high, drain some of the oil until it is at the correct level; refer to "Checking Oil Level," page 10.

Figure 9 D.

HYDRAULIC

LINES AND FITTINGS

Lines and fittings are the "linkages" that tie the components of the hydraulic system together. They must carry the fluid without leaking, under pressures of perhaps 1,000 to 4,000 psi (6895 to 27580 kPa) or more.

2. SAE Straight Thread Q-ring Seal

A.

In order for these parts to do their job, it is necessary that they be in good condition, mounted and routed correctly, and properly tightened.

A daily inspection

should include:

1. Check for clearance; another line or part.

lines should not rub against

Assure that the connecting parts are clean. Sand, grass, or other contaminants will prevent a good seal and may damage the O-ring. The O-ring is the most important part in this type of connection as it serves as the main seal of the connection (Fig. 10).

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2. Check for poor physical condition; look cracks, abrasions, swelling, and deterioration.

3. Check for bends, fluid flow restriction slow operation.

Hold the adapter with a wrench and tighten the nut the number of flats indicated in the chart on page 14, according to the hose size (Fig. 9). This should secure the connection.

for

dents, and kinks; too much may cause overheating and

4. Look for signs of oil leakage.

The correct method for tightening hydraulic fittings should be followed at all times: 1. SAE Flare Connections A.

5.12

Assure that the two connecting parts are clean. Sand, grass or other contaminants will prevent a good seal, no matter how tight the fitting is torqued.

Rev. 1985

Figure 10 B.

Always replace the a-ring seal when this type fitting shows signs of leakage.

c,

The jam nut and washer must be to the back side of the smooth portion of the elbow adapter (Fig. 11).

PERIODIC MAINTENANCE STANDARD TORQUE

DATA

FOR HYDRAULIC TUBES AND FITTINGS a-RINGS BOSS PLUGS, ADJUSTABLE FITTING LOCKNUTS, SWIVEL J.I.C. - 37째 SEATS LINE SIZE 4 5 6 8 10 12 14 16 20 24 32

THREAD

TUBING 00.

MM INCHES

SIZE (U.S. STD.)

6.4 7.9 9.5 12.7 15.9 19.1 22.2 25.4 31.8 38.1 50.8

7/16 - 20 1/2 - 20 9/16 - 18 3/4 - 16 7/8-14 1-1/16 - 12 1-3/16 - 12 1-5/16 - 12 1-5/8 - 12 1-7/8-12 2-1/2 - 12

1/4 5/16 3/8 1/2 5/8 3/4 7/8 1 1-1/4 1-1/2 2

FOOT-POUNDS MAX. MIN. 6 10 15 25 35 60 70 80 95 120 250

10 15 20 30 40 70 80 90 115 140 300

KqM

MIN. .82 1.8 2.07 3.45 4.83 8.28 9.66 11.04 13.11 16.56 34.5

M"Ax:1.8 2.07 2.76 4.14 5.52 9.66 11.04 12.42 15.87 19.32 41.4

ROTATENO. OF HEX FLATS 21/2 21/2 2 2 11/2-2 1 1 3/4-1 3/4-1 1/2-3/4 V2_3/4

Torque figures above are recommended for plain, cadmium, or zinc plated fittings; dry or wet installations.

These torque valves are not for tubes of 1/2 inch (12.7mm) 0.0. or larger with wall thicknesses of .035 inch (.889mm) or less. The torque is specified for .035 inch (.899mm) wall tubes on each application individually.

B.

Failure of the flexible hydraulichosesmost often occurs because of damage, but can also be the result of weather, chemicals, or storage conditions where the machine is stored in an extremely warm environment.

A preventive maintenance replacement program that has hydraulic hoses replacedat the first sign of damage should prove beneficial when lines are not protected from the elements, such as the sun, chemicals, or physical damage.

Torque Information

Figure 15 TABLE:

DT = Desired Torque WL = Wrench Effective Length TL = Total Length TS = Torque Setting

Calculation of torque setting is necessary when adapters are used with a torque wrench (as shown).

FORMULA: DT xnWL = TS EXAMPLE:

5.14

Desired torque is 15 ft-lb (2.07 KgM) Wrench length 13.2 inches (33.5cm) Total length 14.2 inches (36.0cm)

IMPORTANT NOTE: When replacing the hydraulic hose that connects the control valve to the oil cooler (radiator) special care should be taken regarding the hydraulic fitting on the oil cooler because on newer GROUNDSMASTER@ mowers, it is a special fitting.

Newer gasoline models may contain a special washer which is used as an orifice to restrict oil flow into the cooler. Be careful to account for and install this washer properly between the 90 degree elbow and the hydraulic hose fitting. Should the washer be allowed to tilt sideways during installation, a squeal-

Rev- 19B5