Clark GCX30 Specifications
The Clark GCX30 is an indoor-optimized cushion-tire
internal-combustion forklift engineered to deliver consistent performance in
high-cycle warehouse environments, manufacturing plants, distribution hubs, and
assembly lines. With a nominal lifting capacity of 3,000 kg (6,000 lb) at a 610
mm load center, the GCX30 occupies a central position within Clark’s mid-range
cushion-tire lineup, offering stable lifting behavior, tight maneuverability,
and smooth ride quality on sealed industrial flooring.
Its compact chassis and low turning radius
allow precise operation in narrow aisles, while the structural framework
and reinforced mast assembly support continuous lifting cycles typical
of multi-shift industrial facilities.
The GCX30’s powertrain consists of either a Waukesha 2.9-liter or
Continental TM27 2.7-liter LPG/Gasoline engine, each designed for
predictable low-RPM torque, smooth throttle modulation, and extended
mechanical longevity.
Combined with a heavy-duty powershift
transmission, robust hydraulic system, protected electrical
architecture, and cushion-tire wheel configuration, the GCX30 provides
excellent control, safe handling, and reliable operation throughout
intensive day-to-day usage. Maintenance access is simplified through
wide-opening engine panels, modular component groupings, and clear
service intervals designed to minimize downtime.
The GCX30 is equipped with industrial
internal-combustion engines designed to deliver stable torque at low to mid RPM
ranges. Both the Waukesha 2.9 L and Continental TM27 2.7 L engines utilize
conservative governed speeds, reinforced internal construction, and fuel mapping
optimized for repetitive lift-truck loading cycles.
Engine Characteristics (Waukesha 2.9 L):
- Type: 4-cylinder, 4-stroke OHV industrial engine
- Displacement: approx. 2.9 L
- Rated output: approx. 45-60 kW (60-80 hp)
- Peak torque: approx. 140-165 lb-ft (190-224 Nm)
- Idle speed: approx. 750-850 rpm
- Governed maximum: approx. 2,500-2,700 rpm
- Fuel type: LPG or gasoline
- Fuel system: mixer-type vapor system or gasoline carburetor
- Notes: Designed for continuous indoor shuttle duty with consistent low-speed
torque
Engine Characteristics (Continental TM27 2.7
L):
- 4-cylinder 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 speed: approx. 750-850 rpm
- Governed speed: approx. 2,600-2,800 rpm
- Fuel type: LPG or gasoline
- Fuel system: mixer-regulated LPG delivery
- Notes: Smooth low-RPM operation suitable for fine load control
Lubrication System:
- Lubrication type: full-pressure wet sump
- Oil capacity: approx. 4.5-5.0 L (Waukesha) / 4.0-4.8 L (TM27)
- Oil pressure: approx. 25-55 psi (172-379 kPa)
- Oil filter: full-flow spin-on type
- Recommended viscosity: SAE 10W-30 or 15W-40
- Lubricated components: crankshaft, rods, valvetrain, camshaft, auxiliaries
Cooling System:
- Coolant capacity: approx. 7-8 L (7.4-8.4 qt)
- Thermostat opening: approx. 82°C (180°F)
- System pressure: approx. 13-15 psi (90-103 kPa)
- Pump: belt-driven centrifugal pump
- Radiator: multi-row industrial core
- Fan: mechanical engine-driven fan
The GCX30 employs a torque-converter powershift
transmission engineered for repetitive directional transitions, precise speed
modulation, and smooth acceleration characteristics. The driveline is optimized
for frequent shuttle operations on flat indoor flooring, where predictable
engagement and reduced driveline shock are essential.
Transmission:
- Type: 1-speed or 2-speed powershift
- Forward speed (unladen): approx. 16-18 km/h (10-11 mph)
- Reverse speed: approx. 14-16 km/h (9-10 mph)
- Transmission oil capacity: approx. 6-7 L (6.3-7.4 qt)
- Recommended fluid: ATF Dexron III
- Direction control: mechanical lever or electro-hydraulic selector
Drive Axle:
- Axle type: cast-steel differential with planetary reduction hubs
- Differential: bevel-gear configuration
- Lubrication capacity: approx. 4-5 L (4.2-5.3 qt)
- Lubricant: SAE 80W-90 or 85W-140
- Axle features: sealed bearing assemblies for extended operating life
Braking System:
- Service brakes: hydraulic wet-disc, oil-immersed
- Parking brake: mechanical hand lever
- Wet-disc characteristics: fade-resistant, low contamination, long pad life
- System voltage: 12 V
- Battery capacity: approx. 80-100 Ah
- Alternator output: approx. 55-75 A
- Starter motor: approx. 1.7-2.5 kW
- Safety interlocks: neutral-start circuit, seat switch, LPG lock-off system
- Lighting: front work lamps standard; optional rear lighting or beacon
The GCX30 chassis uses a reinforced welded-steel
structure designed for long-term durability in indoor industrial settings. The
cushion-tire arrangement allows tight turning and low rolling resistance, while
the drive and steer configuration supports stable, predictable handling in
warehouse aisles.
Drive Configuration:
- Drive wheels: front
- Steering wheels: rear
- Drive type: 2-wheel drive (2WD)
Tire Specifications (Cushion):
- Front tires: 21x7x15
- Rear tires: 16x6x10.5
Optional
Tires:
- Non-marking compounds
- High-durability warehouse compounds
Chassis Features:
- Fully welded steel frame
- Reinforced mast mounting structures
- Protected hydraulic line routing
- Low-step operator access
Steering:
- Steering type: hydrostatic power steering
- Pump flow: approx. 10-13 L/min (2.6-3.4 gpm)
- Steering axle: oscillating center-pivot design
- Turning radius: approx. 2.0-2.3 m (79-91 in)
- Steering behavior: smooth, low-effort, high precision in confined
aisles
The hydraulic architecture of the GCX30 is engineered
for predictable lift control, minimal drift, and durable component longevity
across repetitive lifting operations commonly encountered in industrial indoor
workflows.
- Maximum hydraulic pressure: approx. 2,300-2,600 psi (159-179 bar)
- Hydraulic pump: engine-driven gear pump
- Flow rate: approx. 35-55 L/min (9-14.5 gpm)
- Reservoir capacity: approx. 22-26 L (23-27 qt)
- Hydraulic fluid: ISO VG 32 or ISO VG 46
- Cylinders: double-acting lift cylinders; dual tilt cylinders
| 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 fluid: 6-7 L (6.3-7.4 qt)
- Drive axle oil: 4-5 L (4.2-5.3 qt)
- Hydraulic oil: 22-26 L (23-27 qt)
Mast Types:
- Duplex (2-stage)
- Triplex (3-stage full free lift)
Lift Heights:
- Duplex: approx. 3.0-3.7 m (118-146 in)
- Triplex: approx. 4.3-5.5 m (169-216 in)
Free-Lift: approx. 0.15-0.40 m (6-16 in)
Forks:
- Length: 1,067 mm (42 in) standard; 48-60 in optional
- Width: approx. 100 mm (4 in)
- Thickness: approx. 40-45 mm (1.6-1.8 in)
Rated capacity: 3,000 kg (6,000 lb) at 610 mm (24 in)
load center
De-rating: applies with attachments, fork extensions, elevated load heights, or
off-center loading
- Lift speed (unladen): approx. 0.45-0.55 m/s (90-110
ft/min)
- Lift speed (laden): approx. 0.30-0.40 m/s (60-80 ft/min)
- Lowering speed: unladen 110-140 ft/min; laden 130-160 ft/min
- Gradeability: unladen approx. 18-24%; laden approx. 14-18%
- Drawbar pull: approx. 12,000-16,000 N (2,698-3,597 lbf)
- Length to fork face: approx. 2.4-2.6 m (94-102 in)
- Overall width: approx. 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. 75-100 mm (3-4 in)
- Turning radius: approx. 2.0-2.3 m (79-91 in)
- Aisle width (1000x1200 pallet): approx. 3.3-3.6 m (130-142 in)
- Maximum fork height: 3.0-5.5 m depending on mast
- Free lift: 0.15-0.40 m
- Fork lengths: 42-60 in
- Operating weight: approx. 3,700-4,200 kg (8,157-9,259 lb)
250-Hour:
- Replace engine oil and filter
- Clean radiator fins
- Inspect air filter
- Lubricate mast and steer axle
500-Hour:
- Replace transmission filter
- Inspect hydraulic filter
- Check driveline couplings and axle seals
- Verify mast chain tension and slide block wear
1,000-Hour:
- Replace transmission oil
- Replace axle oil
- Inspect hydraulic cylinders and lines
2,000-Hour:
- Replace hydraulic oil
- Replace coolant
- Perform full mast assembly inspection and bearing service
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