Gehl Skid-Steer Loader SL5640

To check the hydraulic filter element, run the engine at full throttle and normal operating temperature. Lift the engine access cover. Observe the hydraulic filter indicator located on the filter head (Figure 40). If the indicator is green, the filter does not need replacing. If the indicator is red, replace the filter following the instructions below.

2. Open the reservoir drain plug located on the inside bottom of the right riser.

3. Drain the oil out to a level below the point where the filter attaches to the reservoir.

4. Replace the reservoir drain plug.

5. Refill the hydraulic oil reservoir with oil. Refer to the Lubrication chart (page 52).

6. Spin off the old hydraulic filter element and spin on the new filter element.;

NEVER defeat the safety interlock system by mechanically or electrically bypassing any switches, relays or solenoid valves.

An interlock system is provided on the loader for operator safety. Together with solenoid valves, switches and relays, the interlock system:

➤ Prevents the engine from starting unless the operator is sitting on the seat and the operator restraint bar is lowered.

➤ Disables the lift arm, auxiliary hydraulics, attachment tilt and wheel drives whenever the operator leaves the seat, turns the keyswitch to Off or raises the restraint bar.

Testing the Safety Interlock System

Before exiting the machine, check the safety interlock system for proper operation:

Warning: This procedure requires trained personnel with PPE!

Enter the wheel mounting hardware torque in ft-lbs

Is the wheel mounting hardware torque at 180 ft-lbs?

If wheels are removed and reinstalled, repeat the procedure.

Enter the All-Tach pivot torque in ft-lbs

Is the All-Tach pivot torque at 240 ft-lbs?

Refer to the Maintenance Interval chart (page 75) for All-Tach pivot torque check.

Is the alternator/fan belt in good condition?

If the belt is worn, cracked or otherwise deteriorated, replace the belt following the procedure in the engine manual.

⚠️ WARNING: Inflating or servicing tires can be dangerous. Trained personnel should service and mount tires. Follow the safety precautions below.

Rotate the tires from front to rear and rear to front to keep tire wear even.

Keep the same size tire on each side of the loader to prevent excessive wear on tires, chains, or other damage.

The tread bar of all tires should face the same direction.

Tire beads and rim flanges lubricated with a soap solution.

Use a clip-on tire chuck with remote hose and gauge, allowing you to stand clear while inflating the tire.

Inflation pressure to seat the beads (Do NOT inflate beyond 35 psi (240 kPa)).

If the beads have not seated by the time the pressure reaches 35 psi (240 kPa), deflate the assembly, reposition the tire on the rim, lubricate both parts and re-inflate.

The loader should be cleared daily of dirt and other foreign materials in the following areas:

- on the hitch, especially around tilt cylinder

- around the hydraulic oil reservoir breather

- in the operator’s compartment

Important: Build up of foreign materials in these areas can interfere with the operation of the loader, cause component damage or become a fire hazard.