Machine models

Cat 303.5C CR and 303C CR specifications

Entries in this reference
Listing-entry count
2

Short answer

Cat 303.5C CR and 303C CR: excavators.

Selected configuration figures
Configuration	Documented field and quantity
303.5C CR	Net Power 39.4 hp Operating Weight 8,200 lb
303C CR	Net Power 30 hp Operating Weight 7,573 lb

303.5C CR and 303C CR specification matrix — Listing labels reported by the source
Publisher name	Source guide	Listing-entry count	Labels named by the source
Cat	303.5C CR and 303C CR	2	303.5C CR and 303C CR

Boom/Stick Option (Hex) 1
Specification	303.5C CR	303C CR
Shipping Length Of Unit	15.83 ft	16.9 ft
Max Cutting Height	16.5 ft	16.25 ft
Shipping Height Of Unit	8.17 ft	8.21 ft
Max Loading Height	11.75 ft	11.5 ft
Max Reach Along Ground	17.18 ft	16.9 ft
Max Vertical Wall Digging Depth	8.17 ft	7.1 ft
Max Digging Depth	10.33 ft	9.7 ft
Boom/Stick Option (Hex) 1	Standard Stick	Standard Stick

Dimensions and weight
Specification	303.5C CR	303C CR
Width To Outside Of Tracks	5.83 ft	5.08 ft
Length Of Track On Ground	7.25 ft	7.25 ft
Ground Clearance	1.12 ft	1.04 ft
Height To Top Of Cab	8.17 ft	8.17 ft
Tail Swing Radius	3.17 ft	2.55 ft
Removal Counterweight Clearance	1.83 ft	1.86 ft

Specification	303C CR
Track Gauge	4.1 ft
Maximum Dump Height - Long Stick	11.84 ft
Maximum Dump Height - Standard Stick	11.45 ft
Maximum Horizontal Reach - Long Stick	17.55 ft
Maximum Horizontal Reach - Standard Stick	16.73 ft
Maximum Reach - Ground Level - Standard Stick	16.8 ft
Maximum Vertical Dig Depth - Standard Stick	7.1 ft
Shipping Height	8.2 ft
Maximum Digging Depth - Long Stick	10.5 ft
Maximum Cutting Height - Standard Stick	16.24 ft
Shipping Length	15.55 ft
Maximum Cutting Height - Long Stick	16.61 ft
Height - Over Cab	8.2 ft
Width - Over Track	5.09 ft
Maximum Digging Depth - Standard Stick	9.6 ft
Swing Radius - Rear	2.92 ft
Length - Center Of Rollers	16.73 ft
Track Shoe Width	0.98 ft
Transport Width	5.09 ft

Undercarriage
Specification	303.5C CR	303C CR
Shoe Size	12 in	11.82 in
Max Travel Speed	2.8 mph	4.6 mph

Specification	303.5C CR
Track Gauge	4.83 ft

Engine
Specification	303.5C CR	303C CR
Number Of Cylinders	3	3
Engine Model	S3Q2T	S3Q2
Gross Power	41 hp	31 hp
Net Power	39.4 hp	30 hp
Power Measured @	2,400 rpm	2,300 rpm
Displacement	114.6 cu in	116 cu in

Operational
Specification	303.5C CR	303C CR
Operating Weight	8,200 lb	7,835 lb
Fuel Capacity	13.5 gal	11.9 gal
Cooling System Fluid Capacity	1.6 gal	1.6 gal
Hydraulic System Fluid Capacity	17.2 gal	17.2 gal
Engine Oil Capacity	1.6 gal	1.6 gal
Operating Voltage	12 V	12 V
Alternator Supplied Amperage	50 amps	50 amps
Hydraulic System Relief Valve Pressure	3,553 psi	3,553 psi
Hydraulic Pump Flow Capacity	23.2 gpm	23.2 gpm

Swing Mechanism
Specification	303.5C CR	303C CR
Swing Speed	9 rpm	9 rpm

Swing System
Specification	303C CR
Machine Swing Speed	9 rpm
Boom Swing - Left - Without Stop	80 degrees
Boom Swing - Left - With Stop	55 degrees
Boom Swing - Right	50 degrees

Weights
Specification	303C CR
Operating Weight	7,573 lb
Operating Weight - With Cab	7,835 lb

Blade
Specification	303C CR
Blade height	13 in
Blade width	5.1 ft
Lift Height	16 in
Dig Depth	18 in

Hydraulic System
Specification	303C CR
Operating Pressure - Swing	2,495 psi
Operating Pressure - Equipment	3,553 psi
Operating Pressure - Travel	3,553 psi
Digging Force - Stick - Standard	4,249 lb
Digging Force - Stick - Long	3,799 lb
Digging Force - Bucket	7,419 lb
Auxiliary Circuit - Primary (245 Bar/3,553 Psi)	15.9 gpm
Auxiliary Circuits - Secondary - At 174 Bar	7.1 gpm

Service Refill Capacities
Specification	303C CR
Cooling System	1.6 gal
Fuel Tank	11.9 gal
Hydraulic Tank	9.8 gal
Hydraulic System	17.2 gal
Engine Oil	1.6 gal

Engine Dimensions
Specification	303C CR
Bore	3.5 in
Stroke	4.1 in

Sound Levels
Specification	303C CR
Cab	82 dB(A)
Canopy	78 dB(A)

Msc Comments
Specification	303C CR
Msc Spec Date	12/05

Travel System
Specification	303C CR
Maximum Traction Force - High Speed	3,979 lb
Maximum Traction Force - Low Speed	7,508 lb
Gradeability - Maximum - High	30 degrees
Travel Speed - High	2.9 mph
Travel Speed - Low	1.6 mph

Variants — Source comparison annotation
Source guide	Differing-field count reported
303.5C CR and 303C CR	74

Ratios
Figure	303.5C CR	303C CR
Engine horsepower per 1,000 lb of weight	4.8	3.8
Fuel tank per engine horsepower	0.34 gal	0.40 gal
Hydraulic power from the listed pump flow and relief pressure	48.1 hp	48.1 hp

Cat 303.5C CR and 303C CR: excavator

303.5C CR and 303C CR: forum references — Forum-title search
Forum index	Equipment class queried	Names in the search	Matching titles
Heavy Equipment Forums	excavator	Cat and the 303.5C CR, 303C CR	15

Topics named by those titles
Title topic	Titles
parts and manuals	2

Topic in the title	Threads	Share of matching threads
parts and manuals	2	13%

CAT 303c Cr Auto Idle Issue 4498 Page Service Manual Not Very Helpful (Heavy Equipment Forums, 2026-06-09)
Part Identification On CAT 303c Cr (Heavy Equipment Forums, 2025-05-09)
CAT 303c Cr Swing Boom Not Working (Heavy Equipment Forums, 2025-01-27)
Bought Grey Market CAT 303c Cr (Heavy Equipment Forums, 2024-06-09)

Used market for the 303.5C CR and 303C CR — Dated first-page listing snapshot
Observation date	Listing source	Equipment search	Listings
2026-09-24	MachineryTrader	Cat excavator	3

Model	Listed	Model years	Lowest asking	Highest asking	Median asking	Median hours
303C CR	3	2006 to 2024	$11,000	$62,981	$16,000	None shown

303.5C CR and 303C CR: 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 excavator 303.5C CR, 303C CR	No matching recall in this search

Sources for this page
Evidence class	Document, classification and recorded date
Reference site	Reference site: Cat 303.5C CR — RitchieSpecs. Observed 2026-09-24.
Reference site	Reference site: Cat 303C CR — RitchieSpecs. Observed 2026-09-24.
Forum threads	Forum threads: Heavy Equipment Forums thread index for Cat 303.5C CR and 303C CR — Heavy Equipment Forums. Observed 2026-09-24.
Used-market listings	Used-market listings: MachineryTrader listings for Cat 303C CR — 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.

Cat 303.5C CR and 303C CR: Configuration records

303.5C CR

Specification	Source figure
Engine
Net Power	39.4 hp
Engine Model	S3Q2T
Gross Power	41 hp
Number Of Cylinders	3
Power Measured @	2,400 rpm
Dimensions and weight
Tail Swing Radius	3.17 ft
Width To Outside Of Tracks	5.83 ft
Length Of Track On Ground	7.25 ft
Height To Top Of Cab	8.17 ft
Removal Counterweight Clearance	1.83 ft
Boom/Stick Option (Hex) 1
Max Cutting Height	16.5 ft
Max Loading Height	11.75 ft
Max Reach Along Ground	17.18 ft
Max Vertical Wall Digging Depth	8.17 ft
Max Digging Depth	10.33 ft
Boom/Stick Option (Hex) 1	Standard Stick
Shipping Length Of Unit	15.83 ft
Shipping Height Of Unit	8.17 ft
Undercarriage
Shoe Size	12 in
Max Travel Speed	2.8 mph
Operational
Fuel Capacity	13.5 gal
Hydraulic System Fluid Capacity	17.2 gal
Hydraulic System Relief Valve Pressure	3,553 psi
Hydraulic Pump Flow Capacity	23.2 gpm
Cooling System Fluid Capacity	1.6 gal
Engine Oil Capacity	1.6 gal
Operating Voltage	12 V
Alternator Supplied Amperage	50 amps
Swing Mechanism
Swing Speed	9 rpm
Additional specifications
Displacement	114.6 cu in
Ground Clearance	1.12 ft
Track Gauge	4.83 ft
Operating Weight	8,200 lb

Source

303C CR

Specification	Source figure
Engine
Net Power	30 hp
Engine Model	S3Q2
Gross Power	31 hp
Number Of Cylinders	3
Power Measured @	2,300 rpm
Dimensions and weight
Tail Swing Radius	2.55 ft
Width To Outside Of Tracks	5.08 ft
Length Of Track On Ground	7.25 ft
Height To Top Of Cab	8.17 ft
Maximum Dump Height - Standard Stick	11.45 ft
Maximum Horizontal Reach - Standard Stick	16.73 ft
Maximum Reach - Ground Level - Standard Stick	16.8 ft
Maximum Vertical Dig Depth - Standard Stick	7.1 ft
Removal Counterweight Clearance	1.86 ft
Shipping Length	15.55 ft
Swing Radius - Rear	2.92 ft
Height - Over Cab	8.2 ft
Maximum Cutting Height - Standard Stick	16.24 ft
Maximum Digging Depth - Standard Stick	9.6 ft
Track Shoe Width	0.98 ft
Width - Over Track	5.09 ft
Maximum Dump Height - Long Stick	11.84 ft
Maximum Horizontal Reach - Long Stick	17.55 ft
Shipping Height	8.2 ft
Maximum Cutting Height - Long Stick	16.61 ft
Length - Center Of Rollers	16.73 ft
Maximum Digging Depth - Long Stick	10.5 ft
Transport Width	5.09 ft
Hydraulic System
Operating Pressure - Swing	2,495 psi
Operating Pressure - Equipment	3,553 psi
Operating Pressure - Travel	3,553 psi
Digging Force - Stick - Standard	4,249 lb
Auxiliary Circuit - Primary (245 Bar/3,553 Psi)	15.9 gpm
Digging Force - Stick - Long	3,799 lb
Auxiliary Circuits - Secondary - At 174 Bar	7.1 gpm
Weights
Operating Weight - With Cab	7,835 lb
Boom/Stick Option (Hex) 1
Max Cutting Height	16.25 ft
Max Loading Height	11.5 ft
Max Reach Along Ground	16.9 ft
Max Vertical Wall Digging Depth	7.1 ft
Max Digging Depth	9.7 ft
Boom/Stick Option (Hex) 1	Standard Stick
Shipping Length Of Unit	16.9 ft
Shipping Height Of Unit	8.21 ft
Undercarriage
Shoe Size	11.82 in
Max Travel Speed	4.6 mph
Swing System
Boom Swing - Left - Without Stop	80 degrees
Boom Swing - Left - With Stop	55 degrees
Boom Swing - Right	50 degrees
Operational
Fuel Capacity	11.9 gal
Hydraulic System Fluid Capacity	17.2 gal
Hydraulic System Relief Valve Pressure	3,553 psi
Hydraulic Pump Flow Capacity	23.2 gpm
Cooling System Fluid Capacity	1.6 gal
Engine Oil Capacity	1.6 gal
Operating Voltage	12 V
Alternator Supplied Amperage	50 amps
Blade
Blade height	13 in
Blade width	5.1 ft
Service Refill Capacities
Fuel Tank	11.9 gal
Hydraulic Tank	9.8 gal
Engine Oil	1.6 gal
Cooling System	1.6 gal
Engine Dimensions
Bore	3.5 in
Stroke	4.1 in
Msc Comments
Msc Spec Date	12/05
Travel System
Maximum Traction Force - High Speed	3,979 lb
Maximum Traction Force - Low Speed	7,508 lb
Gradeability - Maximum - High	30 degrees
Travel Speed - High	2.9 mph
Travel Speed - Low	1.6 mph
Swing Mechanism
Swing Speed	9 rpm
Sound Levels
Cab	82 dB(A)
Canopy	78 dB(A)
Additional specifications
Displacement	116 cu in
Ground Clearance	1.04 ft
Track Gauge	4.1 ft
Digging Force - Bucket	7,419 lb
Operating Weight	7,573 lb
Machine Swing Speed	9 rpm
Lift Height	16 in
Dig Depth	18 in
Hydraulic System	17.2 gal

Source

Compare Cat 303.5C CR, 303C CR

Boom/Stick Option (Hex) 1
Specification	303.5C CR	303C CR
Shipping Length Of Unit	15.83 ft	16.9 ft
Max Cutting Height	16.5 ft	16.25 ft
Shipping Height Of Unit	8.17 ft	8.21 ft
Max Loading Height	11.75 ft	11.5 ft
Max Reach Along Ground	17.18 ft	16.9 ft
Max Vertical Wall Digging Depth	8.17 ft	7.1 ft
Max Digging Depth	10.33 ft	9.7 ft
Boom/Stick Option (Hex) 1	Standard Stick	Standard Stick

Dimensions and weight
Specification	303.5C CR	303C CR
Width To Outside Of Tracks	5.83 ft	5.08 ft
Length Of Track On Ground	7.25 ft	7.25 ft
Ground Clearance	1.12 ft	1.04 ft
Height To Top Of Cab	8.17 ft	8.17 ft
Tail Swing Radius	3.17 ft	2.55 ft
Removal Counterweight Clearance	1.83 ft	1.86 ft

Undercarriage
Specification	303.5C CR	303C CR
Shoe Size	12 in	11.82 in
Max Travel Speed	2.8 mph	4.6 mph

Engine
Specification	303.5C CR	303C CR
Number Of Cylinders	3	3
Engine Model	S3Q2T	S3Q2
Gross Power	41 hp	31 hp
Net Power	39.4 hp	30 hp
Power Measured @	2,400 rpm	2,300 rpm
Displacement	114.6 cu in	116 cu in

Operational
Specification	303.5C CR	303C CR
Fuel Capacity	13.5 gal	11.9 gal
Cooling System Fluid Capacity	1.6 gal	1.6 gal
Hydraulic System Fluid Capacity	17.2 gal	17.2 gal
Engine Oil Capacity	1.6 gal	1.6 gal
Operating Voltage	12 V	12 V
Alternator Supplied Amperage	50 amps	50 amps
Hydraulic System Relief Valve Pressure	3,553 psi	3,553 psi
Hydraulic Pump Flow Capacity	23.2 gpm	23.2 gpm

Swing Mechanism
Specification	303.5C CR	303C CR
Swing Speed	9 rpm	9 rpm

More in Cat: 301.6C/301.8C, 302.5C: stick reach/blade/auxiliary circuits, 302.5.

Cat 303.5C CR and 303C CR specifications

Cat 303.5C CR and 303C CR: excavator

Sources for this page

Cat 303.5C CR and 303C CR: Configuration records