Clark CQ20, CQ25,CQ30 D,L Forklift Service Manual (SM794)

These Clark CQ20, CQ25, and CQ30 D/L forklifts spend their lives loading trucks, shuffling pallets, and working tight warehouse aisles, often on LPG and under constant stop‑and‑go. This service manual is what I’d use to trace a drivability or cooling issue step by step, so I’m not guessing. For example, if an LPG truck starts losing power under load, this book walks you through a logical path to isolate whether it’s fuel, ignition, or a mechanical problem before you start changing parts.

Applications & Use Cases

• Track hard-start or stalling issues on the LPG engine by following systematic checks instead of random part swaps.
• Disassemble and reassemble components like pumps, housings, and linkages in a repeatable way so everything goes back aligned and sealed.
• Verify cooling system faults when the truck runs hot, using guided inspection points and test procedures.
• Adjust controls and linkages after repairs so lift, tilt, and travel respond correctly and safely.
• Plan workshop workflow by knowing what has to come off first and which systems you’ll disturb during a job.

FAQ

Q: Can I use this manual on a tablet in the shop?

A: Yes, it works well digitally; you can zoom diagrams and search text, but keep the device protected from dirt and fluids.

Q: Is it worth printing sections of this manual?

A: Many techs print just the pages for the job at hand, so they can mark notes and keep them right next to the truck.

Safety Note

Always lock out, support, and depressurize these trucks exactly as described before you loosen, remove, or test any component.

Clark CQ20, CQ25,CQ30 D,L Forklift Index:

GROUP OO(L-HMC) ENGINE (HMC THETA 2.4 LPG)
GROUP 01 Engine Cooling System
GROUP 02 (L-MMC,TIERO) LPG FUEL SYSTEM
(CARBURETED)
GROUP 02 (L-MMC,TlER3) MI-07 FUEL SYSTEM (4G64 LPG)
GROUP 02 (L-HMC THETA 2.4) LPG FUEL SYSTEM
GROUP 03 AIR INDUCTION AND EXHAUST SYSTEM
GROUP 06 TRANSAXLE
GROUP 12
IGNITION SYSTEM
GROUP 13 ELECTRICAL SYSTEM
GROUP 22 WHEELS AND TIRES
GROUP 23 BRAKE / INCHING SYSTEM
GROUP 25
STEERING COLUMN AND GEAR
GROUP 26 STEER AXLE
GROUP 29 HYDRAULIC SUMP, FILTERS, AND PUMP
GROUP 30 HYDRAULIC CONTROL VALVE/ LIFT CIRCUIT
GROUP 32 TILT CYLINDERS
GROUP 38 COUNTERWEIGHT AND CHASSIS

Clark