WhichTractor
  • Rigid chassis
  • WhichTractor size: Standard-size
  • No lab test on file
  • 1968–1975
  • 51 built

WhichTractor size, not the maker’s category

Derived by WhichTractor from a sourced three-point linkage. How we decide what a machine is

Bührer GM-29 Super-Six (A) specs: hp, weight, years

Mercedes-Benz OM 352 six-cylinder diesel. The manufacturer claimed 98.6 horsepower. No laboratory has tested one, so there is no measured figure at the shaft.

Engine power, claimed · gross or net not stated

98.6 hp

73.5 kW as stated by the source

No lab test on file

Claimed · standard not stated by the source

Source · Traktorenlexikon, “Bührer GM 29 SUPER-SIX (A)”, claimed

This is the maker’s own figure, measured at the engine. Power at the PTO is lower — by how much, for this machine, nobody has measured.

Weight
6,195 lb
3-point lift
5,401 lb
Hyd. flow
5.0 gpm
Top speed
13.7 mph

Bührer GM-29 Super-Six (A) specs: key facts

  • The Bührer GM-29 Super-Six (A) was built from 1968 to 1975.

  • The Bührer GM-29 Super-Six (A) has a claimed engine power (gross or net not stated) of 73.5 kW (98.6 hp); it has no measured PTO figure.

  • The Bührer GM-29 Super-Six (A) was offered in two-wheel-drive and four-wheel-drive versions.

  • The Bührer GM-29 Super-Six (A) has a Mercedes-Benz OM 352 engine, a 6-cylinder 5.67 L diesel unit.Source 2

  • The Bührer GM-29 Super-Six (A) weighs 2,810 kg (6,195 lb) unladen.

  • The Bührer GM-29 Super-Six (A) has an independent rear PTO running at 540 rpm.

  • The three-point hitch of the Bührer GM-29 Super-Six (A) lifts 2,450 kg (5,401 lb) at the lower-link ends.

  • The hydraulic pump of the Bührer GM-29 Super-Six (A) delivers 18.8 L/min (5.0 gpm).

Source · Traktorenlexikon, “Bührer GM 29 SUPER-SIX (A)”

How does the GM-29 Super-Six (A) compare with its class?

  • Limitation:

    A three-point lift at the lower links of 2,450 kg is low for its class — 42% below the median of 4,240 kg across the 231 machines within 10% of its power that hold this figure.

  • Limitation:

    A hydraulic pump flow of 18.8 L/min is low for its class — 65% below the median of 53.3 L/min across the 266 machines within 10% of its power that hold this figure.

  • Limitation:

    A maximum engine torque of 255 N·m is low for its class — 29% below the median of 360 N·m across the 279 machines within 10% of its power that hold this figure.

  • Worth knowing:

    An unladen mass of 2,810 kg is low for its class — 33% below the median of 4,200 kg across the 327 machines within 10% of its power that hold this figure.

Derived by WhichTractor from 327 comparable records. How we work this out

Illustration of the 1968–1975 Bührer GM-29 Super-Six (A), a 99 hp farm tractor, four-wheel-drive version · cab was optional — shown without it · colour not recorded — shown unpainted, a drawing generated from its specification record
Illustration — not a photograph · four-wheel-drive version · cab was optional — shown without it · colour not recorded — shown unpainted

How much horsepower does a GM-29 Super-Six (A) have?

The only figure for the GM-29 Super-Six (A) is 98.6 hp (73.5 kW) of claimed engine power, gross or net not stated, no test standard stated — not power at the shaft.

Engine, claimed (gross/net not stated)
98.6 hp

Source · Traktorenlexikon, “Bührer GM 29 SUPER-SIX (A)”

What engine is in a GM-29 Super-Six (A)?

A GM-29 Super-Six (A) has a Mercedes-Benz OM 352, a 6-cylinder 5.67 L diesel engine.

Engine — GM-29 Super-Six (A) engine specifications
Make & modelMercedes-Benz OM 352Source 2
Cylinders6, liquid-cooledSource 2
Displacement346.2 ci · 5.67 LSource 2
Max torque188 lb·ft · 255 N·m @ 1,600 rpm
Electrical system12 V

Source · Traktorenlexikon, “Bührer GM 29 SUPER-SIX (A)”

How much will a GM-29 Super-Six (A) lift, and what is its hydraulic flow?

A GM-29 Super-Six (A) lifts 5,401 lb (2,450 kg) at the lower-link ends of its Category 2 three-point hitch.

Hydraulics & PTO — GM-29 Super-Six (A) hydraulics and PTO specifications
Pump flow5.0 gpm · 18.8 L/min
Hitch categoryCategory 2
Lift at ends5,401 lb · 2,450 kg
Rear PTOIndependent, engine-driven, 540 rpm @ 1,696 engine rpmEngages under loadGround-speed PTO available
PTO shaft1 3/8"- 6 splines

Source · Traktorenlexikon, “Bührer GM 29 SUPER-SIX (A)”

What transmission does a GM-29 Super-Six (A) have?

Transmission specifications for the GM-29 Super-Six (A) are below.

Transmission — GM-29 Super-Six (A) transmission specifications
Top speed13.7 mph · 22 km/h

Source · Traktorenlexikon, “Bührer GM 29 SUPER-SIX (A)”

How much does a GM-29 Super-Six (A) weigh?

A GM-29 Super-Six (A) weighs 6,195 lb (2,810 kg) unladen.

Weights & dimensions — GM-29 Super-Six (A) weights and dimensions
Unladen weight6,195 lb · 2,810 kgtwo-wheel-drive version
Wheelbase98.4 in · 2,500 mmtwo-wheel-drive version
Length157.5 in · 4,000 mm
Width74.4 in · 1,890 mm
Height66.9 in · 1,700 mm
Ground clearance16.5 in · 420 mm
Front track61.4 in · 1,560 mmtwo-wheel-drive version
Rear track59.4 in · 1,510 mmtwo-wheel-drive version
Turning radius, braked13.5 ft · 4.13 m

Source · Traktorenlexikon, “Bührer GM 29 SUPER-SIX (A)”

What oil does a GM-29 Super-Six (A) take, and how much?

A GM-29 Super-Six (A) engine takes 14.8 qt (14.0 L). Single source, not independently verified — always confirm against the operator’s manual for your machine.

GM-29 Super-Six (A) fluid capacities, grades and service intervals
SystemCapacity
Engine oil14.8 qt · 14.0 LSource: Traktorenlexikon, “Bührer GM 29 SUPER-SIX (A)” · single source, not independently verified
Hydraulic11.6 qt · 11 LSource: Traktorenlexikon, “Bührer GM 29 SUPER-SIX (A)” · single source, not independently verified
Cooling system25.4 qt · 24.0 LSource: Traktorenlexikon, “Bührer GM 29 SUPER-SIX (A)” · single source, not independently verified

Always confirm against the operator’s manual for your machine before service.

Which tractors compare with a GM-29 Super-Six (A)?

Within 10% of its 79.2 hp at the PTO as the maker claimed it, with no laboratory test on file, the same type, and first built within 15 years of it.

Common questions about the Bührer GM-29 Super-Six (A)

Is a GM-29 Super-Six (A) two-wheel drive or four-wheel drive?

The Bührer GM-29 Super-Six (A) was offered in two-wheel-drive and four-wheel-drive versions.

What PTO does a GM-29 Super-Six (A) have?

A GM-29 Super-Six (A) has a independent 540 rpm rear PTO on a 1 3/8"- 6 splines shaft.

Sources and how this page was built

Compiled from Traktorenlexikon, “Bührer GM 29 SUPER-SIX (A)”; and Traktorenlexikon, “Mercedes-Benz MB trac 1000”.

Sources checked

14 SEP 2026

Spotted an error?

Sources

Facts taken from these documents, units converted. Numbers beside a figure refer to this list. Licences and attribution

  1. Traktorenlexikon: Bührer GM 29 SUPER-SIX (A) — CC BY-SA 4.0, WIKIBOOKS-TL-119827 · revision 1042464. Wikibooks contributors (Traktorenlexikon). Original document
  2. Traktorenlexikon: Mercedes-Benz MB trac 1000 — CC BY-SA 4.0, WIKIBOOKS-TL-79534 · revision 1053120. Wikibooks contributors (Traktorenlexikon). Original document