A weeping wheel hub or a whining differential usually means the axle has to come apart, and this 64-page Manitou ASK 372, AS 372 KR repair manual PDF (OEM ID 647372EN) is the factory guide for that job on the planetary drive steer axle. Teardown and rebuild procedures form the core of the book, covering the wheel hub, pivot, cardan shaft, differential and brake group, and brake cylinders, with bevel gear adjustment and metallic oil seal handling broken out separately. Assembly drawings marked with driving torques and a special tools list close it out. When you rebuild the differential, set ring gear to pinion play at 0.2 to 0.3 mm, then refill the central section with about 50 kg (110 lb) of oil and each hub with about 5 kg (11 lb). Guess the backlash and you pay for a chewed crown wheel and a second teardown. Bookmarked and text searchable, the PDF is yours to keep for the life of that axle.
What's Inside This Manitou ASK 372, AS 372 KR Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Specific Data | 7-10 | Description, Identification Data, Packing and Movement |
| Security Regulations | 11-18 | Axle Capacity, Working Factor, Installation of Drive Axle, Brakes, Fixing Drive Axle to the Machine, Wheels Assembly, Drive Axle Utilization, Start-Up |
| Maintenance | 19-22 | Foreword, Tests Conducted by the Manufacturer, Routine Inspections, Checking and Changing of the Oil, Recommended Oils, Recommended Greases, Greasing Points |
| Disassemblies | 23-28 | Disassembly of the Wheel Hub, Disassembly of the Pivot, Disassembly of the Cardan Shaft, Disassembly of the Internal Shaft, Removal of the Brake Cylinders |
| Cleaning and Inspections | 29-30 | Cleaning, Bearings, Brake Disks, Seals, Oil Retaining Rings and Thrust Washer, Gears, Use of Thread-Locking Adhesive and Paste Seals |
| Assemblies | 31-40 | Assembly of the Differential Unit, Assembly and Installation of the Pinion Unit, Assembly of the Differential and Brake Group, Bevel Gear Adjustment |
| Torques and Special Tools | 41-64 | Assy's Drawing and Driving Torques, Special Tools |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Central section oil capacity | about 50 kg (110 lb) | p. 21 |
| Central section oil capacity | 50 kg | p. 21 |
| Wheel hub oil capacity | about 5 kg (11 lb) | p. 21 |
| Wheel hub oil capacity | 5 kg | p. 21 |
| Planet gear needle bearing grease | FINA MARSON EPL 3, NLGI:3 degree | p. 39 |
| Wheel hub ring nut tightening torque | 30-35 Nm | p. 36 |
| Bevel ring gear and pinion play | 0.2 to 0.3 mm | p. 34 |
| Axle bronze bush thickness | 6 mm | p. 38 |
| Minimum tie rod position (dimension B) for brake disc replacement | 24.5 mm | p. 60 |
| Brake piston adjustment depth (dimension A) | 40.2 mm | p. 60 |
| Axle weight | 1450 kg | p. 9 |
| Maximum input pressure (brake actuating) | 150 bar | p. 13 |
Manitou ASK 372, AS 372 KR Common Problems This Manual Covers
Manitou ASK 372 AS 372 KR axle brake cylinders showing reduced braking power in normal operation
Remove the ignition key with the engine off and keep it in your possession before working on the cylinders (page 60). Remove plugs pos.4 and 5 and spring pos.3, then measure dimension A through hole pos.4 with a caliper. Loosen nut pos.2 and screw nut pos.1 until piston depth reads 40.2 mm. Refit nut pos.2 and recheck A. Never back nut pos.1 out too far, or the machine will not brake.
Manual Section: Brake cylinder adjustment p. 60Brake cylinder parking brake failing to release after cylinder installation and start-up on axle
Verify the machine is properly blocked and the parking brake is not mechanically neutralized, as page 52 requires. With no pressure in any connection, measure dimension C through hole pos.6. It must be 40.2 mm. If it is higher, parking brake release is not guaranteed. If it is lower, the service brake will not work properly. Do not use the machine until the brakes work properly.
Manual Section: Torques and Special Tools p. 52Wheel hub planetary oil level below the edge of the hub plug hole
Rotate the hub until plug pos.2 sits on the axle middle line, and wear hand protection because page 21 warns the oil can be near 100°C (212°F). Remove the plug and check that oil reaches the edge of the hole. Top up only with the same oil type and never mix oils. On a full change, refill each hub with about 5 kg (11 lb).
Manual Section: Checking and changing oil in wheel hubs p. 21Wheel bearing tightness out of adjustment at the 1000 work hour inspection
Adjust the wheel bearing tightness every 1000 work hours, as page 20 lists. Tighten the ring nut with special wrench OMCI No.3 until the hub turns under about 30 to 35 Nm (page 36). If the hub has to come off, hold it with a suitable lifting means because it weighs about 60 kg (page 25). Fit new wheel hub oil seals whenever you disassemble it.
Manual Section: Assemblies p. 36Differential bevel ring gear and pinion backlash out of spec after reassembly
Install a magnetic comparator on one side of a ring gear tooth. Rock the ring gear both ways without turning the pinion. Play must be 0.2 to 0.3 mm. Paint several teeth to read the contact pattern described on page 34. For low bearing on the gear and high bearing on the pinion, move the pinion away and bring the ring gear closer. Work the ring nuts until both checks pass.
Manual Section: Bevel gear adjustment p. 34Pivot axle bronze bushes worn thin, found during spindle and pivot pin reassembly
Measure the axle bronze bushes before refitting the spindle. New thickness is 6 mm, and page 38 says to change them once they reach 5 mm. Support the spindle with a suitable lifting means and keep it well balanced, because it weighs about 200 kg (440 lb) at this stage. Guide the axle shaft in without touching the oil seal lip.
Manual Section: Assemblies p. 38Frequently Asked Questions
What is the hydraulic oil or lubricant specification for the Manitou ASK 372?
The recommended oil for the axle is API GL5. Specific brands listed include AGIP ROTRA MP, API APILUBE EP, BP HYPO GEAR EP, CASTROL GEAR EP, ELF TRANSELF B, ESSO GEAR OIL GX, FIAT TUTELA W140M-DA, FINA PONTONIC MP, IP PONTIAX HD, MOBIL MOBILUBE HD, Q8 Q8 T55, and SHELL SPIRAL HD. p. 22
How do I perform a complete overhaul of the axle?
A complete overhaul is required after every 10,000 work hours. This involves replacing all seals, retaining rings, oil seals, and bearings; it is advisable to send the entire axle to the manufacturer for this service. p. 20
What is the oil capacity for the central section of the Manitou ASK 372, AS 372 KR planetary drive steer axle?
The oil capacity for the central section of the axle is approximately 50 kg (110 lb). p. 21
What is the correct torque for the central unit section screws on the Manitou ASK 372, AS 372 KR axle?
The torque values for the central unit section screws are 205 Nm, 135 Nm, 500 Nm, 50 Nm, and 190 Nm as shown in the central unit drawing. p. 42
Will this Manitou ASK 372 Repair Manual download right away?
A 64-page Repair Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Is this Manitou ASK 372 Repair Manual printable?
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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