824 & 834 WHEEL TRACTORS Every 2000 Service Hours Or 1 Year Caterpillar

Every 2000 Service Hours Or 1 Year
1.1. (30)Front And Rear Differentials And Final Drives
2.1. (31)Hydraulic System
3.1. (32)Steering Gear Sector Housing
4.1. (33)Brake Accumulator
5.1. (34)Engine Valve Lash
6.2. Adjusting Valve Lash
7.1. (35)Cooling System - Changing Antifreeze Solution

(30)Front And Rear Differentials And Final Drives

1. Position each wheel with drain plug down.

2. Remove final drive drain plugs.

3. Remove front differential drain plug and allow oil to drain.

4. Remove rear differential drain plug and allow oil to drain.

5. Clean and install all drain plugs.

6. Fill front differential to level of fill plug opening. Install plug.

7. Fill rear differential to level of check plug opening. Install check and fill plugs.

8. On 834 Tractor, fill final drives to level of fill plugs.
9. On 824 Tractors, position each wheel with the fill plug horizontal to the axle.
10. Remove fill plugs.
11. On 824 Tractors, fill each final drive with 9.75 gals. (37 ltr.), (8.1 Imp. gals.) of lubricant.
12. Install all plugs.

13. Remove front breather.

14. Remove rear breather.
15. Wash breathers in clean solvent. Oil lightly and install breathers.

(31)Hydraulic System

1. Oil warm, equipment lowered, engine stopped and parking brake set.

------ WARNING! ------

Use caution when draining oil. Personal injury can result if hot oil contacts skin.


2. Move controls to help relieve pressure. Remove fill cap slowly to relieve system pressure.

3. Remove drain opening cover and allow oil to drain.
4. Clean cover assembly.
5. Be sure cover seal is in place. Use new seal if necessary.
6. Install drain opening.

7. Remove oil filler screen lock ring. Remove screen.

8. Wash screen in clean solvent.
9. Install screen.

10. Install new filter element. See item (22).

11. Fill tank to above ADD mark in sight gauge. See REFILL CAPACITIES.
12. Check oil several times during the first day of operation.

(32)Steering Gear Sector Housing

1. Remove plug.
2. Maintain oil level to bottom of filler plug opening. Install plug.

(33)Brake Accumulator

1. Check accumulator if brake pressure gauge shows rapid pressure loss without brake application, or if gauge needle fluctuates rapidly, with engine running.

2. Check accumulator when less than 5 full brake applications completely discharges accumulator with engine stopped.

3. To check nitrogen precharge pressure see your AVSpare dealer.

(34)Engine Valve Lash

Check and adjust with engine stopped.

1. Remove camshaft cover.

NOTE: Always turn flywheel in direction of normal rotation. Do not use starting motor to turn flywheel.

2. Remove timing bolt (A) and plug (B).

3. Turn flywheel to close No. 1 exhaust and inlet valves and allow timing bolt (A) to be installed in flywheel, where plug (B) was removed.

4. Check lash for No. 1, No. 3 and No. 5 exhaust valves. Adjust if necessary. See page 25.

5. Check lash for No. 1, No. 2 and No. 4 inlet valves. Adjust if necessary.
6. Remove timing bolt.

7. Rotate flywheel 360° to close No. 6 exhaust and inlet valves and allow timing bolt to be installed in flywheel.

8. Check lash for No. 2, No. 4 and No. 6 exhaust valves. Adjust if necessary.

9. Check lash for No. 3, No. 5, and No. 6 inlet valves. Adjust if necessary.

10. Remove timing bolt from flywheel.
11. Install timing bolt and plug.

12. Install cam shaft cover.

Adjusting Valve Lash

1. Insert a cross point (Phillips) screwdriver in hole inside of cam follower.

2. Turn screwdriver clockwise to increase lash, counterclockwise to decrease lash.

(35)Cooling System - Changing Antifreeze Solution

NOTE: When permanent antifreeze and water solutions are used in the cooling system, the solution should be drained and replaced every 2000 hours or yearly.

When additions of inhibitor are made to the cooling system every 500 hours or three months, it is not necessary to drain and refill yearly.

Whenever draining and refilling the cooling system, always recheck the coolant level when the engine reaches normal operating temperature.

Use clean water that is low in scale forming minerals, not softened water.

Check specific gravity of antifreeze solution frequently in cold weather to assure adequate protection.

Add AVSpare Corrosion Inhibitor or equivalent. Follow recommendations given on container.

------ WARNING! ------

Inhibitor contains alkali, avoid contact with skin and eyes.


NOTE: The engine cooling system is protected to -20°F (-29°C), with permanent-type antifreeze, when shipped from the factory.

1. Park machine on level ground and stop engine.

2. Loosen filler cap slowly to relieve pressure.

3. Remove filler cap.

4. Open drain valve and allow coolant to drain.

5. Remove coolant drain plug from bottom of engine oil cooler, if so equipped.
6. Remove coolant drain plug from torque converter oil cooler, if so equipped.

7. Remove coolant drain plug from bottom of water pump, if so equipped.

8. Remove coolant temperature regulator housing drain plug, if so equipped.
9. Allow any trapped coolant to drain.
10. Install all drain plugs.
11. Close drain valve.
12. Mix antifreeze solution to provide protection to the lowest expected ambient temperature.
13. Add coolant slowly, 5 U.S. gallons (3.8 litres) per minute or less, to proper level.
14. Install radiator filler cap.
15. Start machine. Recheck level after operating for a short period.


If machine is to be stored in, or shipped to an area with below freezing temperatures, the cooling system must be drained completely or protected to lowest expected ambient temperature.