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Hyster H135XL Specifications

Basic Information

The Hyster H135XL is a heavy-duty internal combustion forklift designed for harsh industrial environments requiring high lifting capacity, extreme durability, and dependable performance across long operating cycles. With a nominal lifting capacity of 13,500 lb (6,123 kg), the H135XL belongs to the classic Hyster XL-series, a product line celebrated for its rugged steel chassis, low electronics dependence, and long service life.

The model is widely used in steel mills, concrete and block yards, lumber mills, foundries, port facilities, freight terminals, and large-scale fabrication shops. Its powerful diesel or LPG engines and robust drivetrain allow it to thrive where modern electronically complex trucks might struggle.

The H135XL is appreciated for its predictable hydraulic response, stable mast design, excellent visibility, heavy-duty steering axle, generous ground clearance, and simplified mechanical systems.

Even decades after production, the H135XL remains in active service due to its ease of maintenance, availability of parts, and heavy industrial reliability. For operations needing brute lifting power and durability rather than electronics and automation, the H135XL is a proven long-term asset.

Engine Specs

The H135XL was produced with multiple industrial engine choices depending on market and year.

The most common include:
- Cummins B5.9 5.9-liter inline-six diesel engine
- GM 4.3-liter V6 LPG/gasoline industrial engine
- Chrysler or Ford inline-six industrial engines on earlier builds

Diesel Engine Specifications:
- Displacement: approx. 5.9 L
- Power output: approx. 110-120 hp (82-90 kW)
- Torque: approx. 300-350 lb-ft (407-475 Nm)
- Idle speed: approx. 700-750 rpm
- Max governed speed: approx. 2,600-2,700 rpm

LPG Engine Specifications:
- Displacement: approx. 4.3 L
- Power: approx. 85-100 hp (63-75 kW)
- Torque: approx. 150-200 lb-ft (203-271 Nm)

Lubrication System:

The full-pressure wet-sump lubrication system ensures consistent lubrication.
- Oil type: SAE 15W-40 (diesel), 10W-30 or 15W-40 (LPG)
- Oil capacity: approx. 9-11 L (9.5-11.6 qt)
- Oil pressure: approx. 25-35 psi idle (172-241 kPa), 50-70 psi running (345-483 kPa)
- Filtration: replaceable spin-on oil filter

Cooling System:

The H135XL uses a high-capacity cooling module designed for severe-duty cycles.
- Coolant capacity: approx. 18-22 L (19-23 qt)
- Thermostat opening temp: approx. 82°C (180°F)
- Cooling system pressure: approx. 15 psi (103 kPa)
- Pump: mechanical centrifugal
- Fan: engine-driven, shrouded

Drive Train

Transmission:

The H135XL typically includes a heavy-duty powershift transmission.
- Type: 1- or 2-speed hydraulic powershift
- Forward speed (unladen): approx. 12-14 mph (19-22 km/h)
- Reverse speed: approx. 12-13 mph (19-21 km/h)
- Fluid capacity: approx. 18-22 L (19-23 qt)
- Fluid type: ATF Dexron III or equivalent

Electronic clutch modulation in later units improves smoothness.

Drive Axle:

The front drive axle is a reinforced industrial planetary axle.
- Lubricant: SAE 80W-90 or 85W-140
- Capacity: approx. 10-12 L (10.5-12.7 qt)

Planetary hubs increase torque handling.

Brakes:

Depending on production year:
- Service brakes: hydraulic wet-disc or heavy-duty drum
- Parking brake: mechanical or hydraulic spring-applied

Wet-disc brakes provide long life and reliability in harsh conditions.

Electrical System

The H135XL uses a conventional 12-volt electrical system.

- Battery: approx. 100-150 Ah
- Alternator: approx. 70-100 A (diesel)
- Starter motor: approx. 3-4 kW
- Glow plugs: diesel versions
- Distributor ignition: LPG versions on older units

Electronics are minimal for maximum reliability.

Wheels and Tires

The machine features a heavily reinforced welded-steel chassis.

Drive Configuration:
- Drive wheels: front
- Steering wheels: rear
- Mode: 2WD

Tires:
- Front: approx. 12.00-20
- Rear: approx. 10.00-15

Pneumatic tires are best for uneven outdoor surfaces.

The H135XL uses a heavy-duty hydrostatic steering system.

Steering:
- Steering type: orbitrol hydraulic
- Pump flow: approx. 12-18 L/min (3.2-4.8 gpm)
- Steer axle: oscillating center pivot
- Turning radius: approx. 3.5-3.7 m (138-146 in)

Hydraulic System

Hydraulics power lift, tilt, and attachments.

Hydraulic Specifications:
- Pressure: approx. 2,700-3,000 psi (186-207 bar)
- Pump: engine-driven gear pump
- Flow: approx. 60-80 L/min (15-21 gpm)
- Reservoir capacity: approx. 45-55 L (47-58 qt)
- Fluid type: ISO VG 46 or VG 68

Service Refill Capacities

- Engine oil: 9-11 L (9.5-11.6 qt)
- Coolant: 18-22 L (19-23 qt)
- Transmission: 18-22 L (19-23 qt)
- Drive axle: 10-12 L (10.5-12.7 qt)
- Hydraulic tank: 45-55 L (47-58 qt)

Mast Data

Mast configurations include simplex, duplex, and triplex.

Mast Heights:
- Simplex: approx. 3.0-3.6 m (118-142 in)
- Duplex: approx. 3.6-4.5 m (142-178 in)
- Triplex: approx. 4.5-6.0 m (178-236 in)

Free Lift:
- 0.9-1.5 m (35-59 in)

Fork Specifications:
- Length: 1,067-1,524 mm (42-60 in)
- Width: 125-150 mm (5-6 in)
- Thickness: 50-60 mm (2.0-2.4 in)

Load Capacity

Rated capacity: 13,500 lb (6,123 kg) at 24-in (610-mm) load center

Performance Data

- Lift speed (unladen): 80-100 ft/min
- Lift speed (laden): 60-80 ft/min
- Lowering speed (unladen): 100-130 ft/min
- Lowering speed (laden): 110-150 ft/min
- Gradeability (unladen): 25-30%
- Gradeability (laden): 15-20%
- Drawbar pull: 8,000-12,000 N (1,800-2,700 lbf)

Dimensions and Weight

- Length to fork face: 3.3-3.6 m
- Width: 1.7-1.8 m
- Overhead guard height: 2.3-2.4 m
- Wheelbase: 2.0-2.1 m
- Ground clearance: 160-200 mm
- Turning radius: 3.5-3.7 m
- Aisle width: 4.5-4.8 m
- Max fork height: 3.0-6.0 m
- Free lift: 0.9-1.5 m
- Fork lengths: 42-60 in; optional 72 in
- Operating weight: 18,000-20,500 lb (8,165-9,300 kg)
- Counterweight: 4,000-5,500 lb (1,814-2,495 kg)

Maintenance Data

250-Hour:
- Replace engine oil
- Lubricate mast
- Clean radiator
- Check steering pivots

500-Hour:
- Replace transmission filter
- Inspect hydraulic filter
- Inspect drive axle

1,000-Hour:
- Replace transmission fluid
- Replace axle oil
- Inspect hydraulics

2,000-Hour:
- Replace hydraulic oil
- Replace coolant
- Full mast inspection

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