Machine models
Komatsu PC78MR-6 specifications
| Listing-entry count |
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| 1 |
Short answer
Komatsu PC78MR-6: full-size excavator.
| Configuration | Documented field and quantity |
|---|---|
| PC78MR-6 |
|
| Specification | PC78MR-6 |
|---|---|
| Shipping Length Of Unit | 20.34 ft |
| Shipping Height Of Unit | 8.96 ft |
| Max Cutting Height | 21.56 ft |
| Max Loading Height | 14.82 ft |
| Max Reach Along Ground | 22.84 ft |
| Max Vertical Wall Digging Depth | 9.52 ft |
| Max Digging Depth | 13.65 ft |
| Boom/Stick Option (Hex) 1 | Standard arm |
| Specification | PC78MR-6 |
|---|---|
| Width To Outside Of Tracks | 7.62 ft |
| Length Of Track On Ground | 7.34 ft |
| Ground Clearance | 1.19 ft |
| Height To Top Of Cab | 8.96 ft |
| Tail Swing Radius | 4.61 ft |
| Removal Counterweight Clearance | 2.42 ft |
| Specification | PC78MR-6 |
|---|---|
| Shoe Size | 17.72 in |
| Track Gauge | 6.14 ft |
| Drawbar Pull | 14,550 lb |
| Number Of Carrier Rollers Per Side | 1 |
| Number Of Shoes Per Side | 39 |
| Number Of Track Rollers Per Side | 5 |
| Ground Pressure | 5.4 psi |
| Max Travel Speed | 2.61 mph |
| Specification | PC78MR-6 |
|---|---|
| Number Of Cylinders | 4 |
| Engine Model | S4D95LE-3 |
| Net Power | 54 hp |
| Power Measured @ | 1,850 rpm |
| Displacement | 199 cu in |
| Aspiration | Turbocharged with aftercooler |
| Specification | PC78MR-6 |
|---|---|
| Operating Weight | 18,232 lb |
| Fuel Capacity | 33.1 gal |
| Cooling System Fluid Capacity | 2.8 gal |
| Operating Voltage | 24 V |
| Hydraulic System Fluid Capacity | 29.1 gal |
| Engine Oil Capacity | 2 gal |
| Alternator Supplied Amperage | 25 amps |
| Hydraulic System Relief Valve Pressure | 3,840 psi |
| Hydraulic Pump Flow Capacity | 42.3 gpm |
| Specification | PC78MR-6 |
|---|---|
| Swing Speed | 10 rpm |
| Specification | PC78MR-6 |
|---|---|
| Reference Bucket Capacity | 0.4 yd3 |
| Minimum Bucket Capacity | 0.2 yd3 |
| Maximum Bucket Capacity | 0.5 yd3 |
| Figure | PC78MR-6 |
|---|---|
| Engine horsepower per 1,000 lb of weight | 3.0 |
| Fuel tank per engine horsepower | 0.61 gal |
| Hydraulic power from the listed pump flow and relief pressure | 94.8 hp |
| Equipment group | full-size excavator |
|---|
| Brand | Equipment group | Compared entry | Sort order |
|---|---|---|---|
| Komatsu | full-size excavator | PC78MR-6 | Descending quantity; 1 is largest |
| Figure | PC78MR-6 | Rank | Lowest in line | Highest in line |
|---|---|---|---|---|
| Engine power | 54.0 hp | 49 of 51 | 50.0 hp | 3,353.0 hp |
| Listed weight | 18,232 lb | 46 of 51 | 13,669 lb | 1,507,962 lb |
| Fuel capacity | 33.1 gal | 44 (tied) of 49 | 26.5 gal | 3,443.0 gal |
| Horsepower per 1,000 lb | 3.0 hp | 32 of 51 | 2.1 hp | 4.4 hp |
| Ground pressure | 5.4 psi | 22 (tied) of 28 | 0.7 psi | 5,050.0 psi |
| Maximum digging depth | 13.7 ft | 33 of 37 | 10.9 ft | 32.8 ft |
The PC78MR-6 beside its neighbours
| Base version | PC78MR-6 | PC80-1 |
|---|---|---|
| Engine power | 54 hp | 60 hp |
| Weight | 18,232 lb | 16,976 lb |
| Fuel capacity | 33.1 gal | 31.8 gal |
| Ground pressure | 5.4 psi | 4.99 psi |
| Maximum digging depth | 13.65 ft | 13.75 ft |
| Forum index | Equipment class queried | Names in the search | Matching titles |
|---|---|---|---|
| Heavy Equipment Forums | full-size excavator | Komatsu and the PC78MR-6 | 18 |
| Title topic | Titles |
|---|---|
| hydraulics | 4 |
| engine power and smoke | 2 |
| electrical and sensors | 2 |
| Topic in the title | Threads | Share of matching threads |
|---|---|---|
| hydraulics | 4 | 22% |
| engine power and smoke | 2 | 11% |
| electrical and sensors | 2 | 11% |
- Komatsu Pc78mr 6 Weak Hydraulics But Good Pressures (Heavy Equipment Forums, 2024-11-18)
- Komatsu Pc78 Mr6 Low Power And Stalling (Heavy Equipment Forums, 2024-03-11)
- Komatsu Pc78mr 6 Boom Cab Lighting No Power (Heavy Equipment Forums, 2024-01-15)
- Komatsu Pc78mr 6 Stalling When Move Stick (Heavy Equipment Forums, 2023-09-25)
| Observation date | Listing source | Equipment search | Listings |
|---|---|---|---|
| 2026-09-24 | MachineryTrader | Komatsu full-size excavator | 9 |
| Model | Listed | Model years | Lowest asking | Highest asking | Median asking | Median hours |
|---|---|---|---|---|---|---|
| PC78MR-6 | 9 | 2004 to 2009 | $14,900 | $29,500 | $26,658 | 6,677 |
| Search date | Database | Names queried | Search result |
|---|---|---|---|
| 2026-09-24 | U.S. Consumer Product Safety Commission | Komatsu together with the full-size excavator PC78MR-6 | No matching recall in this search |
| Evidence class | Document, classification and recorded date |
|---|---|
| Reference site |
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| Forum threads |
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| Used-market listings |
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| Federal agency data |
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Komatsu PC78MR-6: Configuration records
PC78MR-6
| Specification | Source figure |
|---|---|
| Boom/Stick Option (Hex) 1 | |
| Max Vertical Wall Digging Depth | 9.52 ft |
| Boom/Stick Option (Hex) 1 | Standard arm |
| Dimensions and weight | |
| Width To Outside Of Tracks | 7.62 ft |
| Length Of Track On Ground | 7.34 ft |
| Ground Clearance | 1.19 ft |
| Height To Top Of Cab | 8.96 ft |
| Tail Swing Radius | 4.61 ft |
| Removal Counterweight Clearance | 2.42 ft |
| Undercarriage | |
| Shoe Size | 17.72 in |
| Ground Pressure | 5.4 psi |
| Drawbar Pull | 14,550 lb |
| Number Of Carrier Rollers Per Side | 1 |
| Number Of Shoes Per Side | 39 |
| Number Of Track Rollers Per Side | 5 |
| Engine | |
| Engine Model | S4D95LE-3 |
| Displacement | 199 cu in |
| Number Of Cylinders | 4 |
| Power Measured @ | 1,850 rpm |
| Net Power | 54 hp |
| Aspiration | Turbocharged with aftercooler |
| Operational | |
| Fuel Capacity | 33.1 gal |
| Hydraulic System Fluid Capacity | 29.1 gal |
| Hydraulic System Relief Valve Pressure | 3,840 psi |
| Hydraulic Pump Flow Capacity | 42.3 gpm |
| Cooling System Fluid Capacity | 2.8 gal |
| Operating Voltage | 24 V |
| Engine Oil Capacity | 2 gal |
| Alternator Supplied Amperage | 25 amps |
| Buckets | |
| Reference Bucket Capacity | 0.4 yd3 |
| Minimum Bucket Capacity | 0.2 yd3 |
| Maximum Bucket Capacity | 0.5 yd3 |
| Additional specifications | |
| Shipping Length Of Unit | 20.34 ft |
| Shipping Height Of Unit | 8.96 ft |
| Max Cutting Height | 21.56 ft |
| Max Loading Height | 14.82 ft |
| Max Reach Along Ground | 22.84 ft |
| Max Digging Depth | 13.65 ft |
| Track Gauge | 6.14 ft |
| Max Travel Speed | 2.61 mph |
| Operating Weight | 18,232 lb |
| Swing Speed | 10 rpm |
More in Komatsu: PC78UU-8/PC88MR-8, PC60-7/PC75-1, PC80-1.