Hyster Fortis S80FT, S100FT, S120FT, S80FTBCS, S100FTBCS, S120FTS, S120FTPRS (G004) 4-Wheel Cushion Tire Lift Trucks Pdf Repair Service Manual

Hyster Fortis S80FT, S100FT, S120FT, S80FTBCS, S100FTBCS, S120FTS, S120FTPRS (G004) 4-Wheel Cushion Tire Lift Trucks PDF Repair Service Manual

The Hyster G004 Repair Service Manual covers the Fortis S80FT, S100FT, S120FT, S80FTBCS, S100FTBCS, S120FTS, and S120FTPRS — seven 4-wheel cushion tire counterbalance forklifts built for indoor industrial environments. The G004 and H004 carry identical model names across the same Fortis lineup, but they are different production generations. Component specifications, hydraulic circuit configurations, and electrical layouts reflect the G004 build standard — not the H004 revision. If your machine's data plate or service record shows G004, this is the correct document. Applying H004 procedures to a G004 machine produces incorrect results on multiple systems.

Three configuration variants within the G004 series carry specific service implications. The BCS designation on the S80FTBCS and S100FTBCS introduces electrical and control circuit differences from the standard FT baseline. The S120FTS short mast carries its own channel dimensions, roller clearance values, and cylinder stroke data. The S120FTPRS proportional hydraulic control valve requires a post-reassembly calibration procedure that does not exist on standard control valve variants. All three are documented separately where their specifications diverge.

Manual Technical Specifications

Systems and Repair Coverage

Complete diagnostic, disassembly, and rebuild procedures for all seven G004 Fortis variants:

• Engine Overhaul and Fuel System: Cylinder bore and wear measurement, valve clearance per variant, cylinder head surface and valve seat service, head bolt torque sequence — LPG regulator pressure calibration and mixer adjustment, petrol carburettor rebuild, and diesel injection pump timing and nozzle return testing each documented with independent procedures specific to the G004 engine installation
• Mast and Hydraulic Lift Circuit: Standard mast channel wear and roller clearance for S80FT through S120FT, S120FTS short mast specifications in a separate section with independent values, lift cylinder bore assessment and drift test under load, seal replacement, tilt cylinder rod seal service, main relief valve calibration, load-hold valve leak test, and hydraulic pump output pressure and flow testing
• Proportional Control Valve Repair (S120FTPRS): Valve body disassembly from G004 hydraulic layout, proportional spool condition check, solenoid coil resistance test values specific to G004 PRS configuration, reassembly sequence, and post-reassembly calibration procedure — this calibration step is mandatory after any proportional valve work and is absent from standard control valve repair references
• Powershift Transmission and Torque Converter: Stall test and deviation interpretation, forward and reverse clutch circuit pressure testing with per-capacity values across the S80FT to S120FT range, clutch pack disc and plate measurement, transmission disassembly from G004 Fortis chassis layout, modulation valve inspection, and fault diagnosis for engagement faults and converter temperature conditions
• Drive Axle and Differential: Shaft spline wear check, ring and pinion backlash and depth setting, carrier bearing preload, axle housing crack inspection, hub bearing end-float, and seal replacement with S120FT load tolerances noted where they differ from the S80FT
• Electrical System and BCS Circuit Diagnostics: Charging system output test, solenoid coil resistance values per G004 specification, BCS variant control circuit procedures identified separately from standard FT wiring layout, seat switch and directional lever interlock tested as individual components, parking brake circuit check, engine sender test values, and instrument warning circuit tracing
• Cushion Tyre, Steering, and Brake Repair: Cushion tyre removal and pressing procedure with G004 rim specification, post-press seating inspection, king pin bore measurement and toe-in specification after rebuild, service brake drum wear limit and lining minimum per capacity variant, wheel cylinder inspection, pedal travel adjustment, and parking brake holding force test

Purchasing From Manualskart

The G004 is indexed separately from the H004 on Manualskart — both series appear in the Hyster Fortis range but are listed by their individual series codes so the correct generation document reaches the right machine.

• Immediate download after purchase — no processing delay
• Single purchase, permanent access with no renewal fees
• Full-text searchable PDF — specifications, circuit references, and torque values are keyword-findable
• Printable by section for workshop bench use across multiple machines
• 30-day refund if the series code does not match your machine
• SSL-secured checkout via PayPal or card

Why This Manual Matters for G004 Service

• G004 and H004 share model names but not specifications — hydraulic circuit configurations, electrical layouts, and component test values reflect the G004 generation and cannot be substituted from H004 documentation
• S120FTPRS proportional valve calibration is a mandatory post-reassembly step that does not appear in standard control valve repair references — omitting it leaves the machine with incorrect hydraulic response under load
• S120FTS short mast roller clearances and cylinder stroke limits are unique to that configuration — the standard S120FT values from either generation are not a safe substitute
• BCS electrical circuit differences from the standard FT layout require their own diagnostic reference — standard FT wiring alone is insufficient for accurate fault isolation on BCS variants
• Cushion tyre pressing procedure reflects the G004 rim specification — not carried over from pneumatic tyre S-series or H004 documentation

Download the Hyster Fortis G004 Series Service Manual PDF

For technicians who have confirmed G004 on the series plate, the complete factory repair manual is available immediately at Manualskart.com — find the full range of generation-specific Hyster documentation in the Hyster Service Manual Collection. This Hyster G004 Fortis service manual PDF covers all seven variants — BCS, short mast, and PRS configurations included — across 910+ pages with G004-specific procedures, values, and configurations that apply to this generation only.

Frequently Asked Questions

My machine is a Fortis S100FT — how do I know if I need the G004 or H004 manual?
The model name alone does not identify the correct manual — the series code does. Check the data plate on your machine or your parts and service records. G004 on the plate means this document. H004 means the separate H004 publication. Using the wrong generation document produces incorrect component values on hydraulic, electrical, and mechanical systems.

Does the S120FTPRS proportional valve really need calibration after reassembly?
Yes. The proportional control valve on the S120FTPRS requires a specific calibration sequence after any disassembly and rebuild to restore correct hydraulic response characteristics. This step is not present in standard control valve repair references and is documented in full within this manual.

Are the BCS variants covered differently from the standard FT models?
Yes. The S80FTBCS and S100FTBCS carry electrical and control circuit configurations that differ from the standard FT baseline. The BCS-specific circuit procedures are documented separately within the electrical section so fault tracing on these variants uses the correct references rather than the standard FT wiring layout.

What fuel system types are covered?
LPG, petrol, and diesel configurations are all covered with independent fuel system procedures for each — calibration data specific to the G004 engine installation, not carried over from related series.