Clark GCX25E Specifications
The Clark GCX25E is a mid-capacity internal-combustion
cushion-tire forklift designed for intensive indoor industrial service. With a
nominal lifting capacity of 2,500 kg (5,500 lb) at a 610 mm (24 in) load center,
the GCX25E is engineered for manufacturing plants, distribution centers, and
warehouse facilities requiring precise maneuverability, predictable load
handling, and durable power delivery.
This model incorporates a reinforced
welded-steel chassis, compact profile, and excellent visibility through
a high-strength mast assembly. The cushion-tire configuration, featuring
7.00-12 front and 6.50-10 rear tires, provides reduced rolling
resistance, smooth ride quality, and reliable control on polished indoor
surfaces.
The GCX25E offers two engine options - Waukesha
2.9L and Continental TM27 2.7L - both engineered for industrial
environments with frequent directional changes, sustained idle periods,
and multi-shift operational cycles. This model is recognized for its
ease of maintenance, mechanical durability, and long-term operating
economy.
The GCX25E supports two industrial internal-combustion
engines built specifically for harsh-duty lift truck applications. Both engines
emphasize low-RPM torque delivery, combustion stability, durability under
thermal cycling, and simplified service procedures. Engine access panels allow
for maintenance without obstructing critical hydraulic or drivetrain components.
Engine Characteristics (Waukesha 2.9L):
- Type: 4-cylinder, 4-stroke, overhead-valve industrial engine
- Displacement: approx. 2.9 L
- Output: approx. 45-60 kW (60-80 hp)
- Torque: approx. 140-165 lb-ft (190-224 Nm)
- Idle: approx. 750-850 rpm
- Governed speed: approx. 2,500-2,700 rpm
- Fuel: LPG or gasoline
- Fuel system: industrial carburetor or LPG mixer system
- Construction: cast-iron block, robust crankshaft, industrial camshaft profile
- Features: stable low-RPM torque, conservative fuel curve for long life
Engine Characteristics (Continental TM27
2.7L):
- Type: 4-cylinder, 4-stroke industrial engine
- Displacement: approx. 2.7 L
- Output: approx. 45-55 kW (60-74 hp)
- Torque: approx. 135-155 lb-ft (183-210 Nm)
- Idle: approx. 750-850 rpm
- Governed speed: approx. 2,600-2,800 rpm
- Fuel system: mixer-regulated LPG supply
- Features: smooth torque curve for controlled lifting operations
Lubrication System:
- Wet-sump full-pressure lubrication
- Oil capacity (Waukesha): 4.5-5.0 L (4.7-5.3 qt)
- Oil capacity (Continental): 4.0-4.8 L (4.2-5.1 qt)
- Oil grade: SAE 10W-30 or 15W-40
- Oil pressure: approx. 25-55 psi under working conditions
- Filter: full-flow spin-on
- Lubrication coverage: crankshaft, connecting rods, camshaft, valvetrain,
auxiliary drives
Cooling System:
- Type: liquid cooling with thermostat
- Coolant capacity: approx. 7-8 L (7.4-8.4 qt)
- Thermostat: approx. 82°C (180°F)
- System pressure: approx. 13-15 psi
- Water pump: belt-driven centrifugal
- Radiator: multi-row industrial core
- Fan: mechanically driven
The GCX25E utilizes a heavy-duty powershift
transmission engineered for consistent shuttle behavior and controlled
acceleration during load handling. The torque converter enhances low-speed
maneuverability while reducing driveline shock during directional changes.
Transmission:
- Type: 1 or 2-speed powershift
- Forward speed: approx. 16-18 km/h (10-11 mph)
- Reverse speed: approx. 14-16 km/h (9-10 mph)
- Capacity: approx. 6-7 L (6.3-7.4 qt)
- Fluid: ATF Dexron III
- Direction control: mechanical or electro-hydraulic lever
Drive Axle:
- Cast-steel differential axle with planetary reductions
- Differential: bevel gear industrial unit
- Oil capacity: approx. 4-5 L (4.2-5.3 qt)
- Lubricant: SAE 80W-90 or 85W-140
- Construction: sealed bearings for extended service
Braking System:
- Service brakes: hydraulic wet-disc
- Parking brake: mechanical lever-actuated
- Characteristics: fade-resistant, sealed for contamination control
- System: 12 V
- Battery: 80-100 Ah
- Alternator: 55-75 A output
- Starter: 1.7-2.5 kW motor
- Circuits: neutral start, seat switch, LPG lock-off
- Lighting: front work lamps standard; optional rear lights
Drive
Configuration:
- Front-wheel drive
- Rear-wheel steering
- 2WD cushion-tire indoor configuration
Tire Specifications:
- Front tires: 7.00-12
- Rear tires: 6.50-10
These industrial cushion tires provide improved traction and stability on smooth
indoor surfaces while maintaining low rolling resistance.
Chassis Features:
- Welded-steel frame with reinforced crossmembers
- Protected routing for hydraulic lines and wiring
- Counterweight integrated for stability
- Anti-slip operator platform
Steering:
- Type: hydrostatic
- Pump flow: approx. 10-13 L/min (2.6-3.4 gpm)
- Axle: oscillating center-pivot
- Turning radius: approx. 1.9-2.2 m (75-87 in)
- Steering behavior: responsive, low-effort, suitable for confined aisle spaces
- Maximum pressure: approx. 2,300-2,600 psi (159-179
bar)
- Pump: engine-driven gear pump
- Flow rate: approx. 35-55 L/min (9-14.5 gpm)
- Reservoir: approx. 22-26 L (23-27 qt)
- Fluid: ISO VG 32 or 46
- Cylinders: double-acting lift cylinders; dual tilt cylinders with relief
valves
| Service Refill Capacities |
- Engine oil: 4.0-5.0 L (4.2-5.3 qt)
- Cooling system: 7-8 L (7.4-8.4 qt)
- Transmission: 6-7 L (6.3-7.4 qt)
- Drive axle: 4-5 L (4.2-5.3 qt)
- Hydraulic system: 22-26 L (23-27 qt)
- Mast types: Duplex (2-stage) and Triplex (3-stage
full free lift)
- Duplex heights: 3.0-3.7 m (118-146 in)
- Triplex heights: 4.3-5.5 m (169-216 in)
- Free lift: 0.15-0.40 m (6-16 in)
- Fork length: 1,067 mm (42 in) standard; 48-60 in optional
- Fork section: 100 mm wide, 40-45 mm thick
Rated load: 2,500 kg (5,500 lb) at 610 mm (24 in) load
center
De-rating factors:
increased fork height,
attachments,
fork extensions,
off-center loads
- Lift speed (unladen): 0.45-0.55 m/s (90-110 ft/min)
- Lift speed (laden): 0.30-0.40 m/s (60-80 ft/min)
- Lowering speed: 110-140 ft/min unladen; 130-160 ft/min laden
- Gradeability: 18-24% unladen, 14-18% laden
- Drawbar pull: approx. 12,000-16,000 N (2,698-3,597 lbf)
- Length to fork face: 2.3-2.5 m (91-98 in)
- Width: 1.05-1.15 m (41-45 in)
- Overhead guard height: approx. 2.1-2.2 m (83-87 in)
- Wheelbase: approx. 1.45-1.55 m (57-61 in)
- Ground clearance: approx. 100-120 mm (4-5 in)
- Turning radius: 1.9-2.2 m (75-87 in)
- Aisle width (1000x1200 pallet): 3.4-3.6 m (134-142 in)
- Maximum fork height: 3.0-5.5 m
- Free lift: 0.15-0.40 m
- Fork lengths: 42-60 in
- Operating weight: approx. 3,400-3,900 kg (7,495-8,598 lb)
250-Hour:
- Replace engine oil and filter
- Inspect air filter
- Lubricate mast, steer axle
- Clean radiator and check coolant concentration
500-Hour:
- Replace transmission filter
- Inspect hydraulic filter
- Check driveline and axle seals
- Verify mast alignment
1,000-Hour:
- Replace transmission oil
- Replace axle oil
- Inspect cylinders and hoses
2,000-Hour:
- Replace hydraulic oil
- Replace coolant
- Full mast chain inspection and lubrication
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