Description

Rexroth Bosch A4VG71DA1D4/32R-NZF02F021SH 2005 Parts Catalog

I’ve been torquing head bolts for 28 years, and I’ve seen what happens when a man rebuilds a hydraulic pump with aftermarket parts lists. It costs somebody a lot of money – scrap equipment, blown seals, hours wasted. This Rexroth Bosch A4VG71DA1D4/32R-NZF02F021SH 2005 Parts Catalog is the only way to get the correct part numbers and assembly breakdown for this axial piston unit. 36 pages, factory printed, no guessing. The OCR excerpt on page 1 shows the full spare parts list with Part No. R902055334, designations like ROTARY GROUP, and assembly group markers (L for assembly group, D for sealing element). You need that precision.

What’s Inside the 36-Page Spare Parts List

Page 1 lays out the entire pump: position numbers, part numbers, designations, quantities. You get the housing (R902003862), control hydraulic assembly (R902016077), internal gear pump assembly (R909606663), inch valve, control cartridge, locking screws, orifices, seal kit – everything down to the double break-off pin. Page 3 takes you into the rotary group (R902087289) with exploded-view items like drive shaft (R909921938), cradle bearing assembly (R909830152), and the seal kit for drive shaft (R902002389). Each part is cross-referenced to the drawing number R902005972 (page 1) or R902079242 (rotary group). If you’re ordering replacements, you match those numbers – period.

Understand the Rotary Group Assembly

That rotary group on page 3 is the heart of the pump. It includes the control plate, slide ring, plain roller bearing, retaining rings, and the O-ring (WDR BABSL10FX2 45X80X7-FKM). Without the correct part number for the cradle or bearing liner, you’ll end up with a pump that whines or locks up. I’ve seen techs mix up the R909153104 plain roller bearing with a generic substitute – then wonder why the shaft wobbles. Stick to what’s printed here.

Safety Notes: Factory-Only Repairs

The catalog’s own safety note (page 1) states: “Service – and repair works have to be carried out by the Bosch Rexroth AG or their repair stations only.” Warranty is void if you ignore that. This document is a parts catalog, not a service manual – it helps you identify what to order, but assembly requires training on axial piston units. Don’t think you can skip that step.

3 Reasons to Trust Factory Specs

• OEM part numbers – every number from R902087289 to R909438806 is exactly what Rexroth Bosch uses. Aftermarket cross-references are guesses.
• Assembly group markers – L (assembly group) and D (sealing element) tell you which parts come pre-assembled and which are seals. Critical when ordering the complete seal kit.
• Revision status – version 2/2005, dated 31.08.2005. You get the latest production parts for the A4VG71 series.

Audience Fit: Who Needs This Document

Anyone maintaining mobile hydraulics – forklifts, skid steers, agricultural equipment – with a Rexroth A4VG71 pump. If you’re a home-garage enthusiast with proper hydraulic knowledge, this catalog keeps you from ordering the wrong rotary group. Professional shops use it to bill the right parts the first time. Pair it with the Rexroth A4VG90DA1D4/32R-NZF02F021SH Parts List for similar pumps, or the Bosch Rexroth A4VG56 Hydraulic Units Spare Parts List for smaller displacements. For variable-displacement pumps, grab the Bosch Rexroth A4VSO Variable Displacement Pump Technical Manual.

Related Parts Manuals for Rexroth Bosch Pumps

If you work with multiple Rexroth platforms, check those related manuals. The A4VG56 and A4VSO lines share common cartridge components. And for context on where these pumps are used, see the Automotive Industry Overview – mobile hydraulics drive everything from dump trucks to concrete pumps. Even an Internal Combustion Engine relies on hydraulic systems for cooling fans or steering.

Frequently Asked Questions

Does this catalog include torque specifications?

No, this is a parts catalog only – no torque values, no fluid capacities, no assembly steps.

Can I use this catalog to rebuild the pump myself?

The safety notes on page 1 clearly state that only Bosch Rexroth AG or their authorized repair stations should perform service. That’s not a suggestion – it’s a warranty condition. This document helps you identify and order the correct parts, but if you lack formal training on axial piston units, you risk contamination, incorrect clearances, and seal damage. I’ve seen DIY rebuilds that lasted two hours. Get the official service manual alongside this parts catalog, and have a qualified shop do the assembly if you’re not confident.

Access the Factory Manual – 36 pages of OEM data that keeps your Rexroth Bosch pump running on the job site, not on the bench waiting for parts.