Mast removal, rebuild and adjustment is the one job these 52 pages of the Hyster N50FA repair manual PDF (OEM ID 897447) cover, across 16 truck models from the N50FA to the V30ZMD. Two-stage and three-stage assemblies each get removal, inspection, lift cylinder, chain, sheave and reinstallation procedures, with separate cylinder steps for the N30XMH, N30XMH2 and V30ZMD. Troubleshooting then traces lift cylinder faults, hydraulic leaks, the pump, relief valve and check valve. Set mast and carriage wear plugs to 0.02 in. clearance. Replace any lift chain at the 1047 mm wear limit for 50.8 mm pitch, the 3 percent elongation point. If your order list includes lift chains, load rollers or wear plugs, the clean and inspect steps tell you what to check first. Section bookmarks and a searchable text layer take you straight to the adjustment pages, so your chain and wear plug settings land on Hyster's own figures.
What's Inside This Hyster N50FA–V30ZMD Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety Procedures When Working Near Mast | 6 | Safety Chain, Operator Guard, Lift/Lower Control |
| Load Backrest Extension, Carriage, Load Rollers, Side Rollers, and Forks | 7-11 | Load Backrest Extension, Remove and Install, Carriage Assembly, Carriage Load Rollers, Side Rollers, Disassemble and Assemble |
| Two-Stage Mast Assembly | 12-25 | Remove, Clean and Inspect, Lift Cylinders, Remove and Install Dual-Lift Cylinders, Lift Cylinder, Remove and Install Single Main-Lift Cylinders, Inner Mast Assembly |
| Three-Stage Mast Assembly | 26-39 | Remove, N30XHM, N30XMH2, And V30ZMD Only, Clean and Inspect, Free-Lift Cylinder, Remove and Install, Main Cylinders |
| Mast Operation Check | 40 | Hydraulic Hoses and Tubes, Mast Components, Carriage Controls |
| Lift Chains Check | 41 | General, Clean and Inspect, Lubrication |
| Mast Adjustments | 42-46 | General, Adjust Wear Plugs - Mast, Adjust Free-Lift Chain, Adjust Main-Lift Chains (Two-Stage, Three-Stage), Adjust Wear Strips |
| Carriage Adjustments | 47-48 | Adjust Wear Plug - Carriage, Adjust Side Rollers - Carriage, Adjust Thrust Rollers - Carriage |
| Troubleshooting | 49-52 | Lift Cylinders, Hydraulic Leaks, Pump, Relief Valve, Check Valve, Cylinder Seals, Mast Assembly, Wear Plugs |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Carriage to floor distance (standard) | 82.55 mm | p. 44 |
| Carriage to floor distance (N30XMH, N30XMH2, V30ZMD) | 76 mm | p. 44 |
| Wear plug clearance | 0.02 in. | p. 43 |
| Carriage wear plug clearance | 0.02 in. | p. 47 |
| Lift chain wear limit (3 percent elongation) | 1047 mm (for 50.8 mm pitch) | p. 42 |
Hyster N50FA–V30ZMD Common Problems This Manual Covers
Hyster N30XMH mast carriage drifts down slowly with control valve in neutral and capacity load raised
Measure carriage drift with a capacity load raised 1 m (3 ft) against 50 mm (2 in.) in 10 minutes at 30 C (86 F), per page 40. Close gate valves in both supply lines; continued lowering means leaking lift cylinder seals. If it drops only with the valves open, check lines and fittings, then the main control valve. Never locate leaks with your hands on pressurized components (page 40).
Manual Section: Hydraulic System Leaks Check p. 40Reach truck forks keep tilting forward slowly with the control valve in neutral
Measure tilt drift at the tilt cylinder against 13 mm (0.50 in.) per 10 minutes at 30 C (86 F), as listed on page 40. If over, install a gate valve at the rod-end port, reload, close it and tilt halfway back. Forward creep means leaking piston seals; movement only with the valve open points to lines, fittings, main control valve or solenoid valves (page 41). Never locate leaks with your hands on pressurized components (page 40).
Manual Section: Hydraulic System Leaks Check p. 41Mast lift chains stretched, rusted, cracked, or showing loose leaves and worn pins
Check that the mast is fully lowered or safety chained, the key removed and the battery disconnected before reaching in (page 6). Clean chains with solvent, never steam, and measure with a chain scale: 20 links of 50.8 mm pitch must not exceed 1047 mm (page 42). Replace both chains of the pair, never one section, then inspect anchors, pins and sheaves. Soak chains in SAE 30 engine oil.
Manual Section: Lift Chains Check p. 41Mast weldments not moving smoothly or binding during lowering after wear plug adjustment
Verify the weldment is raised, the key is OFF and safety chains are installed before loosening any wear plug; page 44 warns a bound weldment can suddenly move. Then set each plug to zero clearance at the tightest point and back off 1/8 turn counterclockwise for about 0.02 in., per page 43. Adjust opposite sides equally, tighten jam nuts without moving the setscrew, and recheck without a load.
Manual Section: Mast Adjustments p. 43Carriage not moving freely in mast channels after carriage wear plug adjustment
Verify the carriage is raised, the key is OFF and safety chains are installed before touching a wear plug; page 47 warns a bound carriage can suddenly move. Loosen the jamnut with the dealer special tool and reset the carriage wear plug clearance to 0.02 in. Adjust side rollers only while the carriage is out of the mast, per the note on page 9.
Manual Section: Carriage Adjustments p. 47Mast weldments raising out of sequence or lift chain pair carrying uneven load
Work only with the mast fully lowered or safety chained, key removed (page 6). Adjust each lift chain at its chain anchor, both free-lift (three-stage only) and main-lift sets, so the pair shares load equally and weldments move in the correct sequence (page 43). Check that the cotter pin fits under the adjustment nut; if not, the chains are too short. Tighten anchor lock nuts against the mount plate, per page 44.
Manual Section: Mast Adjustments p. 43Frequently Asked Questions
What are the torque specifications for the mast mounting capscrews on Hyster N50FA, N30XMH and W30-40ZA masts?
The torque specification for the four mount capscrews that fasten the bottom of the mast to the truck frame is 203 N•m (150 lbf ft). p. 25
What is the maximum allowable wear for lift chains?
A lift chain must be replaced if it is 3 percent longer than a new lift chain. You can measure this using a chain scale or by checking the wear limit for 20 links as specified in the table on page 42. p. 41
What is the correct procedure for adjusting the wear plugs on the mast?
Loosen the jam nut and adjust the wear plugs to attain zero clearance at the tightest point. Then, turn the adjustment handle 1/8 turn counterclockwise to achieve approximately 0.02 in. of clearance, ensuring the weldments remain parallel. p. 43
What is the required distance from the floor to the bottom of the carriage for a two-stage mast?
The correct distance from the floor to the bottom of the carriage for a two-stage mast is 82.55 mm (3.25 in.). p. 45
What is the maximum allowable lowering speed for the carriage during a hydraulic leak check?
When the hydraulic oil is 30°C (86°F), the maximum speed the carriage is allowed to lower is 50 mm (2 in.) in 10 minutes. If the oil temperature is 70°C (158°F), the maximum speed is 150 mm (6 in.) in 10 minutes. p. 40
Is this Hyster N50FA manual a download or a disc?
A 52-page Repair Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Can I print a copy of this Hyster N50FA Repair Manual for the shop?
Yes. Print a chapter or just the pages for the job at hand, for use in your own shop. Any home or office printer works.
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