Machine models

Cat 834H: blade positioning, cooling and scoop configurations

Classification: Cat wheel-dozer identification.

Automatic blade positioning is part of the H-Series inspection

The 834H’s C18 ACERT engine and electronic fan control accompany a change in blade operation. Automatic Blade Positioning uses the lift-cylinder position signal and the transmission direction selection. The operator establishes the working and return heights; changing direction then recalls the corresponding blade position.

That is different from merely holding the lift lever in a detent.

Caterpillar’s introduction identifies the system as standard equipment on the BTX-prefix 834H. Its calibration follows the lift linkage and can be performed through the specified service tools. For an inspection, record whether the blade reaches the selected heights in both directions and whether manual override works.

An inaccurate return height needs the position signal and calibration considered alongside the linkage; it does not establish that a hydraulic cylinder needs replacement.

The tilt/tip switch moved into the blade joystick. That control layout is a useful physical distinction when photographs or a listing description confuse a G with an H. The remote power-train pressure connections are behind the cab on the left, allowing the transmission clutch, converter and lock-up circuits to be identified separately during properly specified service testing.

Source: Caterpillar SERV7105-01, January 2005, introduction, blade positioning and diagnostic connections.

Cooling cores and scoop specifications need their own document scope

Two original publications disagree on the radiator count: the introduction describes ten NGMR cores, whereas the September 2007 brochure describes six standard cores. Both identify the NGMR design. Keep that difference explicit when ordering cooling parts; the machine’s serial number and radiator arrangement must settle the actual installation.

The standard wheel-dozer sheet also separates converter-drive output from direct-drive output. A single horsepower number loses that operating condition. Its top direct-drive road speed is not the converter-drive speed for the same gear.

A coal-scoop 834H is separately specified. Cat’s scoop brochure gives different operating mass and hydraulic-tank capacity from the normal blade-equipped sheet, and distinguishes carrying volume from dozing volume. Neither scoop rating belongs in the straight-blade capacity row.

Specify the attachment and movement mode before comparing those volumes with a blade or planning a stockpile pass.

Sources: Caterpillar AEHQ5617-02, September 2007; Caterpillar AEHQ6669-00 coal-scoop specifications.

Earlier reference entries and original manufacturer corrections
Model and field	Earlier entry	Manufacturer figure and scope	Source
834H Height To Top Of Cab	13.33 ft	13.4 ft (4083 mm), AEHQ5617-02 September 2007 cab top; exhaust top is separate	Original document

Entries in this reference
Listing-entry count
1

Short answer

Cat 834H: blade positioning, cooling and scoop configurations: wheel dozer.

Selected configuration figures
Configuration	Documented field and quantity
834H	Gross Power 554 hp Operating Weight 103,849 lb

834H specification matrix — Dimensions and weight
Specification	834H
Length With Blade On Ground	32.42 ft
Ground Clearance	1.74 ft
Height To Top Of Cab	13.4 ft (4083 mm), AEHQ5617-02 September 2007 cab top; exhaust top is separate
Wheelbase	14.93 ft

Engine
Specification	834H
Engine Model	C18 ACERT
Gross Power	554 hp
Net Power	498 hp
Power Measured @	1,800 rpm
Displacement	1,104 cu in

Operational
Specification	834H
Operating Weight	103,849 lb
Fuel Capacity	209.4 gal
Cooling System Fluid Capacity	24.8 gal
Engine Oil Capacity	15.9 gal
Transmission Fluid Capacity	21.9 gal
Hydraulic Tank Capacity	37 gal
Front Diff Fluid Capacity	49.1 gal
Rear Diff Fluid Capacity	49.1 gal
Axle Oscillation	13 degrees
Operating Voltage	24 V
Alternator Supplied Amperage	100 amps
Tire Size	35/65-33 L-4

Transmission and speeds
Specification	834H
Number Of Forward Gears	4
Number Of Reverse Gears	3
Max Speed - Forward	23.9 mph
Max Speed - Reverse	14.3 mph

Blade
Specification	834H
Blade Capacity	10.4 yd3
Blade Width	16.7 ft
Blade Height	4.8 ft

Ratios
Figure	834H
Engine horsepower per 1,000 lb of weight	4.8
Fuel tank per engine horsepower	0.42 gal

wheel dozer

Where the 834H ranks in Cat's list — Scope of the captured comparison
Brand	Equipment group	Compared entry	Sort order
Cat	wheel dozer	834H	Descending quantity; 1 is largest

Reference calculations using the earlier specification entries
Figure	834H	Rank	Lowest in line	Highest in line
Engine power	498.0 hp	7 of 60	43.0 hp	907.0 hp
Listed weight	103,849 lb	14 of 70	1,241 lb	235,507 lb
Fuel capacity	209.4 gal	10 of 67	30.0 gal	412.7 gal
Horsepower per 1,000 lb	4.8 hp	11 of 59	3.1 hp	94.7 hp

The 834H beside its neighbours
Base version	834G	834H	834
Engine power	480.1 hp	498 hp	562 hp
Weight	103,851 lb	103,849 lb	105,271 lb
Fuel capacity	212.2 gal	209.4 gal	209.5 gal (US)
Wheelbase	14.93 ft	14.93 ft	14.9 ft

834H: forum references

Related discussion: “CAT 834 Over Heating”: 834.

Used market for the 834H — Dated first-page listing snapshot
Observation date	Listing source	Equipment search	Listings
2026-09-24	MachineryTrader	Cat wheel dozer	1

Model	Listed	Model years	Lowest asking	Highest asking	Median asking	Median hours
834H	1	Not stated	None shown	None shown	None shown	None shown

834H: recall reference — Dated CPSC search
Search date	Database	Names queried	Search result
2026-09-24	U.S. Consumer Product Safety Commission	Cat together with the wheel dozer 834H	No matching recall in this search

Sources for this page
Evidence class	Document, classification and recorded date
Reference site	Reference site: Cat 834H — RitchieSpecs. Observed 2026-09-24.
Used-market listings	Used-market listings: MachineryTrader listings for Cat 834H — MachineryTrader. Observed 2026-09-24.
Federal agency data	Federal agency data: Recall database search for Cat — U.S. Consumer Product Safety Commission. Observed 2026-09-24.