CAT Skid Steer Loader 249D

Warning: Pressurized system: Hot coolant can cause serious burn. To open cap, stop engine, wait until radiator is cool. Then loosen cap slowly to relieve the pressure.

NOTICE: Mixing ELC with other products will reduce the effectiveness of the coolant. This could result in damage to cooling system components.

If Caterpillar products are not available and commercial products must be used, make sure they have passed the Caterpillar EC-1 specification for premixed or concentrate coolants and Caterpillar Extender.

Note: The machine was shipped from the factory with Extended Life Coolant (ELC) in the cooling system.

For information about the addition of Extender to your cooling system, see the Operation and Maintenance Manual, “Cooling System Coolant (ELC) Extender - Add” or consult your Cat dealer.

Drain the coolant whenever the coolant is dirty or whenever the coolant is foaming.

The radiator cap is located under the radiator guard on the top of the engine compartment.

Allow the machine to cool before you change the coolant.

Open the engine access door and raise the radiator guard. Refer to Operation and Maintenance Manual, “Access Doors and Covers”.

If a new belt is installed, check the belt adjustment after 30 minutes of operation. A belt is considered used after 30 minutes of operation.

1. Stop the engine in order to inspect the belt.

2. Open the engine access door. Refer to Operation and Maintenance Manual, “Access Doors and Covers”.

3. Loosen the quarter-turn fasteners (1) on the front of the guard.

4. Remove the guard for the V-belt.

5. Inspect the condition of the belt and the adjustment of the belt. The belt should deflect 10 mm (0.39 inch) to 12 mm (0.47 inch) under a straight pull of 10 kg (22 lb). This measurement should be taken between the alternator pulley and the crankshaft pulley.

Note: A 144-0235 Borroughs Belt Tension Gauge may be used to measure belt tension. This measurement should be taken between the alternator pulley and the crankshaft pulley. Refer to the following table for belt tension.

6. Loosen the mounting bolt (4). Loosen the adjusting bolt (5).

Position one final drive so that the oil fill/drain plug is at the bottom

Remove the oil plugs and allow the oil to drain into a suitable container

Check the drained oil for large metal chips or a significant number of metal particles

Clean the plugs and inspect the plugs. Replace a worn plug or a damaged plug

Position the final drive so that the oil fill/drain plug is at the top

Add oil through the opening of the oil fill/drain plug that is now at the top

Fill the final drive to the bottom of the opening for the oil check plug

Install the two oil plugs. Tighten the oil plugs to a torque of 27 ± 1 N·m (20 ± 0.7 lb ft)

Engine Crankcase Breather - Replace

Note: Only applies to engines with aftertreatment.

Open the engine access door. Refer to Operation and Maintenance Manual, “Access Doors and Covers”.

Tilt the radiator upward. Refer to Operation and Maintenance Manual, “Radiator Tilting”.

The breather is located in the engine compartment on the right-hand side of engine. There is cap on the breather and a replaceable element inside.

Note: This service may be performed without removing the housing from the engine.

Remove the breather cap and remove the filter element.

Note: The C2.2 and C3.3B are equipped with cap on bottom portion of the canister. Use a wrench to remove the breather cap. The C3.8 is equipped with cap on top of canister, remove cap by applying downward pressure on the cap while turning.

Clean the housing and the cap for the breather.

Air Conditioner Condenser - Clean

Personal injury can result from air pressure.

Personal injury can result without following proper procedure. When using pressure air, wear a protective face shield and protective clothing.

Maximum air pressure at the nozzle must be less than 205 kPa (30 psi) for cleaning purposes.

The air conditioner condenser is attached to the engine access door.

Note: Blow compressed air through the core in the opposite direction of air flow to clean condenser.

Single Level Suspension (SLS) undercarriage

Dual Level Suspension (DLS) undercarriage