Rexroth A4VG A6VM Hydrostatic Transmission & Dana Spicer 357 Drop Box Repair Manual PDF

Description

This 163-page technical PDF collection assembles four distinct service and repair documents covering hydrostatic transmission systems, axial piston variable pumps and motors, and the Dana Spicer Clark-Hurth Type 357 drop box. The compilation opens with a Hydromatik training reference on hydrostatic transmission operation for the A4VG71DA 1D2 pump and A6VM107DA 1 motor pairing, then progresses through the complete Bosch Rexroth repair manuals for the A4VG 71-180 variable pump and the A6VM 28-200 variable displacement motor, and closes with the maintenance and repair instruction manual for the Dana Spicer Clark-Hurth Drop Box Type 357.

File Details

• Manual Type: Multi-document technical service and repair compilation
• Document References: RDE 92 003-21-R/01.06, RDE 91 604-11-R/03.06
• Primary Brands: Bosch Rexroth AG, Hydromatik, Dana Spicer Clark-Hurth
• Covered Assemblies: A4VG71DA 1D2 variable pump, A6VM107DA 1 variable motor, A4VG 71-180 variable pump, A6VM 28-200 variable motor, Drop Box Type 357
• Languages: English, German, Italian, Spanish, French
• File Format: PDF
• Page Count: 163

Chapters Covered

• Hydromatik A4VG71DA / A6VM107DA Transmission Unit Operation
• Hydraulic Circuit Diagrams – MHT 780 TE3, MHT X 780 TE3, MHT 860 LTE3, MHT X 860 LTE3, MHT 950 LTE3, MHT X 950 LTE3
• Rexroth A4VG 71-180 Repair Manual (Safety, Product Description, Exchanging External Assembly Groups, Checking)
• Rexroth A6VM 28-200 Repair Manual (Safety, Product Description, Exchanging External Assembly Groups, Checking)
• Dana Spicer Clark-Hurth Drop Box Type 357 Maintenance and Repair

Hydrostatic Transmission Principles and Hydromatik DA Controls

The opening section explains the operating principles of hydrostatic transmission in the A4VG71DA / A6VM107DA configuration. It details the continuous automatic variation of transmission ratio, the DA control acting as a maximum load power control, and the specific advantages of the Hydromatik design including bent-axis motor geometry with shoe-free pistons allowing 90% of rated load torque on start-up, inching valve operation coupled to the brake pedal, and the HP locking system for torque direction detection. A basic circuit diagram identifies the Perkins 1104C-44TA engine, variable displacement hydrostatic pump, variable displacement hydrostatic motor, booster pump, booster relief valve, and high-pressure valves with all callout numbers explained.

Hydraulic Circuit Diagrams for MHT 780 / 860 / 950 Series

Multiple exploded hydraulic circuit diagrams show hose routing, connection points, radiator and fan installation, filter placement, and the complete circuit layout for the MHT 780 TE3, MHT X 780 TE3, MHT 860 LTE3, MHT X 860 LTE3, MHT 950 LTE3 and MHT X 950 LTE3 configurations. Component identification covers EEM (manipulator exclusion solenoid valve), EFS (parking brake solenoid valve), F.A. (intake filter), F.R. (exhaust filter), M (I.C. engine), M.I. (hydrostatic motor), P.F. (brake pump), P.I. (hydrostatic pump), PI(G) (G connection of hydrostatic pump), S.C. (radiator), R. (oil tank), and VSLR (slow-fast speed selector valve).

Bosch Rexroth A4VG 71-180 Variable Pump Repair

The Rexroth A4VG repair manual covers the swashplate-design axial piston variable pump in nominal sizes 71 through 180. Detailed procedures walk through shaft seal replacement with the correct mounting sleeve material number for each size, seal set replacement for positioning piston covers, valve and pressure cut-off seals, auxiliary pump exchange, and control unit removal and reinstallation for HW, HD, EP and DA controllers. The checking chapter gives step-by-step procedures for verifying low pressure (charge pressure) at connection G, high pressure via the pressure cut-off, mechanical zero stroke using position chamber interconnection and pressure gauges, and hydraulic zero stroke at ports X1 and X2, with torque values specified throughout.

Bosch Rexroth A6VM 28-200 Variable Motor Repair

The A6VM manual covers the bent-axis variable displacement motor across sizes 28 to 200 and includes DA, EP, HD, HA, and HZ controller variants. Procedures detail shaft seal replacement with model-specific mounting sleeves, seal nut adjustment with dimension X measurement, controller removal and reinstallation with spring tension handling, cylinder pin inspection, cover sealing with LOCTITE 510, O-ring replacement, and throttle pin installation orientation by controller type. The checking chapter provides begin-of-regulation test methods for EP, HD, HA, DA1/4, and DA2/3/5/6 controllers with pressure gauge ranges, pilot pressure examples, and adjustment screw rotation directions for advancing or retarding regulation onset.

Dana Spicer Clark-Hurth Drop Box Type 357

The Dana Spicer Clark-Hurth drop box manual provides disassembly and assembly of the directly flanged reduction gear 357 for both mechanical and hydraulic gear control versions. The manual includes lubricant specifications (SAE 85W90 API GL3), oil change intervals (every 1000 hours), tightening torque tables by bolt size and thread type, conversion tables for Nm/daNm/kNm/kgm/lb-in, reduction gear schematics with exploded views, gear control cylinder removal and installation, shaft assembly with bearing preload measurement, distance washer calculation (S = B − A − backlash), and LOCTITE 510 and 242 application points with specified torque values for flange nut (260–280 Nm), gear control rod (25–26 Nm), and cover screws (49–51 Nm).

Get instant access to this complete hydrostatic transmission, Rexroth A4VG / A6VM, and Dana Spicer 357 drop box service library. Every procedure, torque value, pressure setting, adjustment dimension, and exploded diagram is delivered as a single PDF file — no shipping, no waiting. View it on any device, print the pages you need for the workshop, and keep the full reference on hand for routine maintenance, troubleshooting, or a complete overhaul. This collection covers the full spectrum from basic hydrostatic operating principles through component-level seal replacement and zero-stroke calibration to complete drop box disassembly and reassembly.

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