Machine models

Cat 307B, 307B SB, and 307C SB specifications

Entries in this reference
Listing-entry count
3

Short answer

Cat 307B, 307B SB, and 307C SB: full-size excavators.

Selected configuration figures
Configuration	Documented field and quantity
307B	Gross Power 55 hp Operating Weight 14,330 lb
307B SB	Gross Power 41 hp Operating Weight 16,314 lb
307C SB	Gross Power 55 hp Operating Weight 18,497 lb

307B, 307B SB, and 307C SB specification matrix — Listing labels reported by the source
Publisher name	Source guide	Listing-entry count	Labels named by the source
Cat	307B, 307B SB, and 307C SB	3	307B, 307B SB, and 307C SB

Boom/Stick Option (Hex) 1
Specification	307B	307B SB	307C SB
Max Cutting Height	23.92 ft	20.28 ft	20.28 ft
Max Loading Height	16.9 ft	13.65 ft	13.65 ft
Max Reach Along Ground	20.35 ft	22.61 ft	22.61 ft
Max Vertical Wall Digging Depth	11.95 ft	9.85 ft	9.85 ft
Max Digging Depth	13.49 ft	13.65 ft	13.65 ft
Boom/Stick Option (Hex) 1	boom w/ stick 1670mm	boom w/ stick 1670mm	Stick 5'6" (1665mm)

Specification	307C SB
Shipping Length Of Unit	22.28 ft
Shipping Height Of Unit	8.63 ft

Dimensions and weight
Specification	307B	307B SB	307C SB
Width To Outside Of Tracks	7.22 ft	7.22 ft	7.52 ft
Length Of Track On Ground	6.96 ft	6.96 ft	6.96 ft
Ground Clearance	1.25 ft	1.25 ft	1.25 ft
Height To Top Of Cab	8.63 ft	8.67 ft	8.63 ft
Tail Swing Radius	5.75 ft	5.75 ft	5.75 ft

Specification	307B	307B SB
Removal Counterweight Clearance	2.58 ft	2.58 ft

Specification	307C SB
Maximum Cutting Height - Standard Stick	20.2 ft
Maximum Digging Depth - Long Stick	14.4 ft
Maximum Digging Depth - Standard Stick	13.6 ft
Maximum Dump Height - Long Stick	14.6 ft
Maximum Dump Height - Standard Stick	13.65 ft
Maximum Reach - Ground Level - Long Stick	24.3 ft
Maximum Reach - Ground Level - Standard Stick	22.6 ft
Maximum Vertical Dig Depth - Long Stick	11.7 ft
Maximum Vertical Dig Depth - Standard Stick	9.81 ft
Shipping Height	8.64 ft
Shipping Length	19.91 ft
Center Ground Clearance	1.25 ft
Length - Center Of Rollers	6.96 ft
Height - Over Cab	8.64 ft
Maximum Cutting Height - Long Stick	21.3 ft
Stick Length - Standard Stick	5.46 ft
Swing Radius - Rear	5.74 ft
Track Shoe Width	1.5 ft
Transport Width	90.16 ft
Width - Upper Structure	7.51 ft
Stick Length - Long Stick	7.25 ft

Undercarriage
Specification	307B	307B SB	307C SB
Shoe Size	17.72 in	17.72 in	17.72 in
Track Gauge	5.75 ft	5.75 ft	5.75 ft
Drawbar Pull	12,130 lb	12,130 lb	12,810 lb
Max Travel Speed	3.11 mph	3.11 mph	3.3 mph

Specification	307C SB
Ground Pressure	5.22 psi

Engine
Specification	307B	307B SB	307C SB
Engine Model	4M40E1	4M40E1	C 4M40E1
Gross Power	55 hp	41 hp	55 hp
Displacement	173 cu in	173 cu in	173 cu in

Specification	307B	307B SB
Bore	3.7 in	3.7 in
Stroke	4 in	4 in
Flywheel Power	54 hp	40 hp
Eec 80/1269	54 hp	40 hp
SAE J1349	54 hp	40 hp
ISO 9249	54 hp	40 hp

Specification	307C SB
Net Power	54 hp

Operational
Specification	307B	307B SB	307C SB
Operating Weight	14,330 lb	16,314 lb	18,497 lb
Fuel Capacity	35.7 gal	35.7 gal	35.7 gal
Hydraulic System Fluid Capacity	24.9 gal	27.8 gal	24.9 gal

Specification	307B	307C SB
Hydraulic System Relief Valve Pressure	4,550 psi	4,550 psi

Specification	307B SB	307C SB
Hydraulic Pump Flow Capacity	33.9 gpm	17 gpm

Specification	307C SB
Cooling System Fluid Capacity	4.1 gal
Engine Oil Capacity	3 gal
Swing Drive Fluid Capacity	0.4 gal

Weights
Specification	307B	307B SB	307C SB
Operating Weight	17,235 lb	18,555 lb	18,479 lb

Specification	307C SB
Operating Weight - With Cab	18,500 lb

Hydraulic System
Specification	307B	307B SB
Pilot System - Maximum Flow	4.9 gpm	4.9 gpm
Pilot System - Maximum Pressure	500 psi	570 psi
Maximum Pressure - Travel	4,550 psi	4,550 psi
Maximum Pressure - Swing	3,980 psi	3,980 psi
Maximum Pressure - Implements	3,980 psi	3,980 psi
Main Implement System - Maximum Flow (2x)	17 gpm	17 gpm
Boom Cylinder - Bore	4.3 in	4.3 in
Boom Cylinder - Stroke	39.3 in	39.3 in
Stick Cylinder - Bore	3.5 in	3.5 in
Stick Cylinder - Stroke	36.7 in	36.7 in
Blade - Maximum Flow	9 gpm	9 gpm
Blade System - Maximum Pressure	2,990 psi	2,990 psi

Specification	307B
Swing Boom System - Maximum Pressure	2,990 psi

Specification	307C SB
Operating Pressure - Swing	2,840 psi
Operating Pressure - Equipment	3,980 psi
Operating Pressure - Travel	4,550 psi
Digging Force - Stick - Standard	7,843 lb
Digging Force - Stick - Long	6,896 lb
Digging Force - Bucket	9,830 lb

Service Refill Capacities
Specification	307B	307B SB	307C SB
Cooling System	4 gal	4 gal	4 gal
Fuel Tank	35.7 gal	35.7 gal	35.7 gal
Hydraulic Tank	15 gal	15 gal	15 gal
Engine Oil	1.9 gal	1.9 gal	2.9 gal

Specification	307B	307B SB
Final Drive - Each	0.5 gal	0.5 gal
Hydraulic System - Including Tank	24.8 gal	24.8 gal
Swing Drive - Each	0.4 gal	0.4 gal

Specification	307C SB
Hydraulic System	24.8 gal

Drive
Specification	307B	307B SB
Maximum Drawbar Pull	12,810 lb	12,360 lb
Travel Speed	3.1 mph	3.1 mph

Swing System
Specification	307C SB
Machine Swing Speed	11 rpm

Swing Mechanism
Specification	307C SB
Swing Speed	11 rpm
Swing Torque	10,440 lb-ft

Buckets
Specification	307C SB
Reference Bucket Capacity	0.5 yd3
Minimum Bucket Capacity	0.2 yd3
Maximum Bucket Capacity	0.5 yd3

Engine Dimensions
Specification	307C SB
Bore	3.7 in
Stroke	4 in

Msc Comments
Specification	307C SB
Msc Spec Date	10/05

Travel System
Specification	307C SB
Travel Speed - High	3.3 mph

Variants — Source comparison annotation
Source guide	Differing-field count reported
307B, 307B SB, and 307C SB	90

Ratios
Figure	307B	307B SB	307C SB
Engine horsepower per 1,000 lb of weight	3.8	2.5	2.9
Fuel tank per engine horsepower	0.65 gal	0.87 gal	0.66 gal

Figure	307C SB
Hydraulic power from the listed pump flow and relief pressure	45.1 hp

307B, 307B SB, and 307C SB: owner reports

Related account: “Would not shut off, no boom pressure and a thumb that did not work”: 306 CR and 307.5.

History and service record of 307B, 307B SB, and 307C SB

Hours owners report. On the UK Plant Talk forum one owner said a friend's 307C had done 15,000 hours with next to no money spent on it, and another described buying a 2001 307B on wide tracks with an offset boom and 4,700 hours for 15,000 pounds. Anyone spent much time on a CAT 307c?, Plant Talk.
Slow swing and tracking. A Heavy Equipment Forums poster with a 2001 307C at about 7,000 hours said it ran well but was slow to swing and slow on the tracks on one side. CAT 307C - slow on swing and track on one side, Heavy Equipment Forums.
Swing gear oil loss. One 307C owner wrote that the machine kept losing swing gear oil out of the filler tube and dipstick, and took the hydraulic lines and swing motor off to find the cause. Cat 307 swing gearing vent?, Heavy Vehicle Inspection community.
Weak hydraulics. A buyer of a 2002 307C with 5,200 hours asked the Heavy Vehicle Inspection community about slow, weak hydraulics; one reply advised cutting open the filters removed during service to check them for particles that might point to a bigger problem. 2002 Cat 307c slow/weak hydraulics, Heavy Vehicle Inspection community.
When the 307 line ended. In a Heavy Equipment Forums thread asking whether anyone had complaints about the 307C, a poster noted that Cat discontinued the 307 line for 2013. Cat 307 c, Heavy Equipment Forums.

307B, 307B SB, and 307C SB: forum references — Forum-title search
Forum index	Equipment class queried	Names in the search	Matching titles
Heavy Equipment Forums	full-size excavator	Cat and the 307C line that the 307B, 307B SB, 307C SB belongs to (no title names the exact model)	28

Topics named by those titles
Title topic	Titles
hydraulics	6

Topic in the title	Threads	Share of matching threads
hydraulics	6	21%

CAT 307b Implement Flow Control Question (Heavy Equipment Forums, 2024-09-21)
CAT 307c Sleeve Bearings Bushings (Heavy Equipment Forums, 2023-01-31)
CAT 307c Track Tensioner (Heavy Equipment Forums, 2022-04-08)
CAT 307b No Main Boom Pressure On Initial Startup Or After Disengaging And Rengaging Hydraulics (Heavy Equipment Forums, 2021-12-18)

Used market for the 307B, 307B SB, and 307C SB — Dated first-page listing snapshot
Observation date	Listing source	Equipment search	Listings
2026-09-24	MachineryTrader	Cat full-size excavator	1

Model	Listed	Model years	Lowest asking	Highest asking	Median asking	Median hours
307C SB	1	2004	$19,072	$19,072	$19,072	None shown

307B, 307B SB, and 307C SB: 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 full-size excavator 307B, 307B SB, 307C SB	No matching recall in this search

Sources for this page
Evidence class	Document, classification and recorded date
Reference site	Reference site: Cat 307B — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Cat 307B SB — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Cat 307C SB — RitchieSpecs. Observed 2026-09-24.
Forum threads	Forum threads: Heavy Equipment Forums thread index for Cat 307B, 307B SB, and 307C SB — Heavy Equipment Forums. Observed 2026-09-24.
Published history	Published history Source: Anyone spent much time on a CAT 307c?, Plant Talk — Co. Observed 2026-09-30.
Published history	Published history Source: CAT 307C - slow on swing and track on one side, Heavy Equipment Forums — Heavyequipmentforums. Observed 2026-09-30.
Published history	Published history Source: Cat 307 swing gearing vent?, Heavy Vehicle Inspection community — Heavyvehicleinspection. Observed 2026-09-30.
Published history	Published history Source: 2002 Cat 307c slow/weak hydraulics, Heavy Vehicle Inspection community — Heavyvehicleinspection. Observed 2026-09-30.
Published history	Published history Source: Cat 307 c, Heavy Equipment Forums — Heavyequipmentforums. Observed 2026-09-30.
Used-market listings	Used-market listings: MachineryTrader listings for Cat 307C — 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.

Offset position changes the 307B and 307C working envelope

The 307B and 307B Swing Boom brochure gives separate digging dimensions for a parallel-offset boom with no offset, left offset and right offset. Its maximum depth and ground-level reach do not remain identical across those positions. A narrow trench beside a wall therefore needs the working envelope in the intended offset position, not only the machine’s headline digging depth.

The 307C/307C SB brochure also separates swing-boom lift charts by stick length and by blade position. Its asterisk marks a load limited by hydraulic capacity rather than tipping. Match the actual stick, bucket, shoes, load radius and support condition to that chart before treating a lift figure as available at the desired position.

An SB designation establishes the swing-boom version, not that all offset and lifting arrangements share one rating.

Cat 307B, 307B SB, and 307C SB: Configuration records

307B

Specification	Source figure
Engine
Engine Model	4M40E1
Gross Power	55 hp
Flywheel Power	54 hp
Eec 80/1269	54 hp
SAE J1349	54 hp
ISO 9249	54 hp
Service Refill Capacities
Cooling System	4 gal
Fuel Tank	35.7 gal
Final Drive - Each	0.5 gal
Hydraulic Tank	15 gal
Hydraulic System - Including Tank	24.8 gal
Engine Oil	1.9 gal
Swing Drive - Each	0.4 gal
Hydraulic System
Pilot System - Maximum Flow	4.9 gpm
Pilot System - Maximum Pressure	500 psi
Maximum Pressure - Travel	4,550 psi
Maximum Pressure - Swing	3,980 psi
Maximum Pressure - Implements	3,980 psi
Main Implement System - Maximum Flow (2x)	17 gpm
Boom Cylinder - Bore	4.3 in
Boom Cylinder - Stroke	39.3 in
Stick Cylinder - Bore	3.5 in
Stick Cylinder - Stroke	36.7 in
Blade - Maximum Flow	9 gpm
Blade System - Maximum Pressure	2,990 psi
Swing Boom System - Maximum Pressure	2,990 psi
Boom/Stick Option (Hex) 1
Max Cutting Height	23.92 ft
Max Loading Height	16.9 ft
Max Reach Along Ground	20.35 ft
Max Vertical Wall Digging Depth	11.95 ft
Max Digging Depth	13.49 ft
Boom/Stick Option (Hex) 1	boom w/ stick 1670mm
Dimensions and weight
Width To Outside Of Tracks	7.22 ft
Length Of Track On Ground	6.96 ft
Height To Top Of Cab	8.63 ft
Tail Swing Radius	5.75 ft
Removal Counterweight Clearance	2.58 ft
Undercarriage
Shoe Size	17.72 in
Track Gauge	5.75 ft
Drawbar Pull	12,130 lb
Max Travel Speed	3.11 mph
Operational
Fuel Capacity	35.7 gal
Hydraulic System Fluid Capacity	24.9 gal
Hydraulic System Relief Valve Pressure	4,550 psi
Drive
Maximum Drawbar Pull	12,810 lb
Travel Speed	3.1 mph
Additional specifications
Ground Clearance	1.25 ft
Displacement	173 cu in
Bore	3.7 in
Stroke	4 in
Operating Weight	14,330 lb

Source

307B SB

Specification	Source figure
Engine
Engine Model	4M40E1
Gross Power	41 hp
Flywheel Power	40 hp
Eec 80/1269	40 hp
SAE J1349	40 hp
ISO 9249	40 hp
Service Refill Capacities
Cooling System	4 gal
Fuel Tank	35.7 gal
Final Drive - Each	0.5 gal
Hydraulic Tank	15 gal
Hydraulic System - Including Tank	24.8 gal
Engine Oil	1.9 gal
Swing Drive - Each	0.4 gal
Hydraulic System
Pilot System - Maximum Flow	4.9 gpm
Pilot System - Maximum Pressure	570 psi
Maximum Pressure - Travel	4,550 psi
Maximum Pressure - Swing	3,980 psi
Maximum Pressure - Implements	3,980 psi
Main Implement System - Maximum Flow (2x)	17 gpm
Boom Cylinder - Bore	4.3 in
Boom Cylinder - Stroke	39.3 in
Stick Cylinder - Bore	3.5 in
Stick Cylinder - Stroke	36.7 in
Blade - Maximum Flow	9 gpm
Blade System - Maximum Pressure	2,990 psi
Boom/Stick Option (Hex) 1
Max Cutting Height	20.28 ft
Max Loading Height	13.65 ft
Max Reach Along Ground	22.61 ft
Max Vertical Wall Digging Depth	9.85 ft
Max Digging Depth	13.65 ft
Boom/Stick Option (Hex) 1	boom w/ stick 1670mm
Dimensions and weight
Width To Outside Of Tracks	7.22 ft
Length Of Track On Ground	6.96 ft
Height To Top Of Cab	8.67 ft
Tail Swing Radius	5.75 ft
Removal Counterweight Clearance	2.58 ft
Undercarriage
Shoe Size	17.72 in
Track Gauge	5.75 ft
Drawbar Pull	12,130 lb
Max Travel Speed	3.11 mph
Operational
Fuel Capacity	35.7 gal
Hydraulic System Fluid Capacity	27.8 gal
Hydraulic Pump Flow Capacity	33.9 gpm
Drive
Maximum Drawbar Pull	12,360 lb
Travel Speed	3.1 mph
Additional specifications
Ground Clearance	1.25 ft
Displacement	173 cu in
Bore	3.7 in
Stroke	4 in
Operating Weight	16,314 lb

Source

307C SB

Specification	Source figure
Engine
Engine Model	C 4M40E1
Gross Power	55 hp
Net Power	54 hp
Weights
Operating Weight - With Cab	18,500 lb
Travel System
Travel Speed - High	3.3 mph
Service Refill Capacities
Cooling System	4 gal
Fuel Tank	35.7 gal
Hydraulic Tank	15 gal
Engine Oil	2.9 gal
Hydraulic System
Operating Pressure - Swing	2,840 psi
Operating Pressure - Equipment	3,980 psi
Operating Pressure - Travel	4,550 psi
Digging Force - Stick - Standard	7,843 lb
Digging Force - Stick - Long	6,896 lb
Digging Force - Bucket	9,830 lb
Swing System
Machine Swing Speed	11 rpm
Boom/Stick Option (Hex) 1
Max Cutting Height	20.28 ft
Max Loading Height	13.65 ft
Max Reach Along Ground	22.61 ft
Max Vertical Wall Digging Depth	9.85 ft
Max Digging Depth	13.65 ft
Boom/Stick Option (Hex) 1	Stick 5'6" (1665mm)
Shipping Length Of Unit	22.28 ft
Shipping Height Of Unit	8.63 ft
Dimensions and weight
Width To Outside Of Tracks	7.52 ft
Length Of Track On Ground	6.96 ft
Height To Top Of Cab	8.63 ft
Tail Swing Radius	5.75 ft
Maximum Cutting Height - Standard Stick	20.2 ft
Maximum Digging Depth - Long Stick	14.4 ft
Maximum Digging Depth - Standard Stick	13.6 ft
Maximum Dump Height - Long Stick	14.6 ft
Maximum Dump Height - Standard Stick	13.65 ft
Maximum Reach - Ground Level - Long Stick	24.3 ft
Maximum Reach - Ground Level - Standard Stick	22.6 ft
Maximum Vertical Dig Depth - Long Stick	11.7 ft
Maximum Vertical Dig Depth - Standard Stick	9.81 ft
Shipping Height	8.64 ft
Shipping Length	19.91 ft
Center Ground Clearance	1.25 ft
Length - Center Of Rollers	6.96 ft
Height - Over Cab	8.64 ft
Maximum Cutting Height - Long Stick	21.3 ft
Stick Length - Standard Stick	5.46 ft
Swing Radius - Rear	5.74 ft
Track Shoe Width	1.5 ft
Transport Width	90.16 ft
Width - Upper Structure	7.51 ft
Stick Length - Long Stick	7.25 ft
Undercarriage
Shoe Size	17.72 in
Track Gauge	5.75 ft
Drawbar Pull	12,810 lb
Max Travel Speed	3.3 mph
Operational
Fuel Capacity	35.7 gal
Hydraulic System Fluid Capacity	24.9 gal
Hydraulic System Relief Valve Pressure	4,550 psi
Hydraulic Pump Flow Capacity	17 gpm
Cooling System Fluid Capacity	4.1 gal
Engine Oil Capacity	3 gal
Swing Drive Fluid Capacity	0.4 gal
Swing Mechanism
Swing Speed	11 rpm
Swing Torque	10,440 lb-ft
Buckets
Reference Bucket Capacity	0.5 yd3
Minimum Bucket Capacity	0.2 yd3
Maximum Bucket Capacity	0.5 yd3
Msc Comments
Msc Spec Date	10/05
Additional specifications
Ground Clearance	1.25 ft
Ground Pressure	5.22 psi
Displacement	173 cu in
Operating Weight	18,497 lb
Hydraulic System	24.8 gal
Bore	3.7 in
Stroke	4 in

Source

Compare Cat 307B, 307B SB, 307C SB

Boom/Stick Option (Hex) 1
Specification	307B	307B SB	307C SB
Max Cutting Height	23.92 ft	20.28 ft	20.28 ft
Max Loading Height	16.9 ft	13.65 ft	13.65 ft
Max Reach Along Ground	20.35 ft	22.61 ft	22.61 ft
Max Vertical Wall Digging Depth	11.95 ft	9.85 ft	9.85 ft
Max Digging Depth	13.49 ft	13.65 ft	13.65 ft
Boom/Stick Option (Hex) 1	boom w/ stick 1670mm	boom w/ stick 1670mm	Stick 5'6" (1665mm)

Dimensions and weight
Specification	307B	307B SB	307C SB
Width To Outside Of Tracks	7.22 ft	7.22 ft	7.52 ft
Length Of Track On Ground	6.96 ft	6.96 ft	6.96 ft
Ground Clearance	1.25 ft	1.25 ft	1.25 ft
Height To Top Of Cab	8.63 ft	8.67 ft	8.63 ft
Tail Swing Radius	5.75 ft	5.75 ft	5.75 ft

Undercarriage
Specification	307B	307B SB	307C SB
Shoe Size	17.72 in	17.72 in	17.72 in
Track Gauge	5.75 ft	5.75 ft	5.75 ft
Drawbar Pull	12,130 lb	12,130 lb	12,810 lb
Max Travel Speed	3.11 mph	3.11 mph	3.3 mph

Engine
Specification	307B	307B SB	307C SB
Engine Model	4M40E1	4M40E1	C 4M40E1
Gross Power	55 hp	41 hp	55 hp
Displacement	173 cu in	173 cu in	173 cu in

Operational
Specification	307B	307B SB	307C SB
Operating Weight	14,330 lb	16,314 lb	18,497 lb
Fuel Capacity	35.7 gal	35.7 gal	35.7 gal
Hydraulic System Fluid Capacity	24.9 gal	27.8 gal	24.9 gal

Service Refill Capacities
Specification	307B	307B SB	307C SB
Cooling System	4 gal	4 gal	4 gal
Fuel Tank	35.7 gal	35.7 gal	35.7 gal
Hydraulic Tank	15 gal	15 gal	15 gal
Engine Oil	1.9 gal	1.9 gal	2.9 gal

More in Cat: 307C/308C CR: booms/auxiliary circuits/clearance, 374DL, E70B.

Cat 307B, 307B SB, and 307C SB specifications

307B, 307B SB, and 307C SB: owner reports

History and service record of 307B, 307B SB, and 307C SB

Sources for this page

Offset position changes the 307B and 307C working envelope

Cat 307B, 307B SB, and 307C SB: Configuration records