Hyster Forklift R30XMF3

WARNING: The lift truck and components are heavy. All lifting devices (hoists, cables, chains, slings, etc.) must be suitable and of adequate capacity to lift the lift truck or component. The lift truck can weigh up to approximately 3541 kg (7800 lb) empty.

Move the steering control so the drive wheel is in a position for straight travel.

WARNING: Disconnect the battery and separate the connector before opening the drive unit compartment door and before inspecting or repairing the electrical system. If a tool causes a short circuit, the high-current flow from the battery can cause injury or parts damage.

Disconnect and remove the battery. Use the battery removal procedure described in either the Operating Manual or the section Periodic Maintenance 8000SRM1472.

Remove the electrical compartment cover for access to the traction motor controller.

WARNING: The capacitor in the traction motor controller can hold an electrical charge after the battery is disconnected. To prevent electrical shock or injury, discharge the capacitor before inspecting or repairing any component. Wear safety glasses. Make certain the battery has been disconnected.

Discharge the capacitor in the controller by connecting a 200-ohm, 2-watt resistor across the controller's a load across the B+ and B- terminals of the motor controller for 10 seconds. Remove the resistor after discharging the capacitor See Figure 18.

Open the drive unit compartment doors and fasten them so that they are fully open. Put a pan under the MDU drain plug and remove the plug. After the oil has completely drained, reinstall the drain plug. Tighten to 22 N•m (16 lbf ft).

WARNING: The motor is heavy. Use appropriate lifting equipment to avoid personal injury.

Warning: This procedure requires trained personnel with PPE!

Upload a photo of the MDU sealing surface for side cover with Loctite 243® and Loctite 5910®

Side cover installed onto MDU assembly correctly?

Enter the torque applied to the side cover capscrews

Upload a photo of the installed breather valve into sealing cap

Steering gear installed onto MDU assembly correctly?

Upload a photo of the installed steering bearing onto steering gear and MDU assembly

Enter the torque applied to the hexagon screws

Upload a photo of the installed oil drain plug into MDU assembly

WARNING: Cleaning solvents can be flammable and toxic and can cause skin irritation. When using cleaning solvents, always follow the recommendations of the manufacturer. Wear eye protection.

CAUTION: Some of the hardware used on the master drive unit (MDU) and traction motor is metric. Use the correct tool to avoid damage.

NOTE: The pinion gear and the large gear MUST be replaced as a set. The spiral bevel pinion and gear set MUST be replaced as a set.

NOTE: The large ball bearing is part of the top case. The top case and the ball bearing are replaced as a unit.

Clean all components thoroughly. Use Loctite® Fast Cleaner No. 706 to remove all traces of adhesive from the lower housing in the area where the thread-protecting shield had been located.

Check all parts for damage or cracks. Replace any damaged parts.

CAUTION: The axle and gear assemblies are installed and removed several times during this procedure. Be careful not to damage the seals.

NOTE: The helical pinion and gear and the bevel pinion shaft and bevel gear are matched sets and MUST be replaced as sets. When replacing the gear sets, always replace the tapered roller bearings.

NOTE: Assembly of the drive unit requires the use of a standard micrometer, torque wrench, and dial indicator. The procedure below specifies the use of a special measuring tool (Hyster P/N 2036120) and a special clamping tool (Hyster P/N 2036121).

Warning: The oil used in the master drive unit should be drained and replaced after 350 hours of initial operation in accordance with the maintenance schedule. After the initial oil change, the master drive unit requires only the addition of the recommended oil to maintain the oil at the proper level.

Drain the oil when it is warm by removing the drain and fill plugs.

Upload a photo of the drain pan under the drain to keep oil off the floor.

Install the drain plug and fill the unit by adding oil slowly.

Allow enough time for the oil to flow through the bearings to fill the reservoir.

The correct level is at the bottom of the fill plug hole.

Sign off on the oil change procedure

Remove the wheel nuts and the drive/steer wheel

Remove the nine capscrews that fasten the lower housing to the upper housing

Remove the four capscrews inside the upper housing

Remove the two capscrews inside the case that are secured with washers and nuts on the opposite side of the upper housing

Separate the upper housing from the lower housing

Remove the capscrews retaining the drive unit cover

Install two wheel nuts on to the wheel bolts