Highway HM-38 Pressure Diggers

Pressure Drill

Highway’s most popular model. Features our industry leading 18″ring gear with a five (5) year factory warranty. This digger redefines the meaning of production and reliability.

Mechanical drive and hydraulic bar
Gas or diesel auxiliary engine
Four speeds forward and reverse transmission
3″ kelly bar design
18″ ring gear
Torque’s to 42,000 ft./lbs.
Digging depths to 30 feet
Fixed, spotter or swing bases
Mounts on single or tandem axle carrier. (specialty carriers available)

AUXILIARY ENGINE: (STANDARD)

John Deere 4045T, Balanced diesel engine 100 HP
OPTIONAL: Highway will work with the following companies:
- CATERPILLAR
- CUMMINS
- DETROIT
- DEUTZ
- FORD
- PERKINS
*Consult factory for models available.

TRANSMISSION:

Four (4) speeds forward and one reverse.
13″ torque converter with safety lock shifter.
Transmission oil cooler.

FUEL SOURCE: (STANDARD) HM 25 Pressure Digger

Fuel supplied by chassis fuel tank (diesel/ diesel)
OPTIONAL: 50 Gallon fuel tank with mechanical gauge.

TORQUE & R.P.M.: (STANDARD)

1st 32,407 ft./lbs. @ 33.1 RPM
2nd 16,156 ft./lbs. @ 66.5 RPM
3rd 9,062 ft./lbs. @ 118.5 RPM
4th 5,178 ft./lbs. @ 207.4 RPM

KELLY BAR:

3″ solid square bar with rounded corners.
4140 tool steel, heat treated
1 1/8″ auger pin hole.

AUGER CAPACITY:

54″ Intermittent
36″ Continuous

HOLE DEPTHS: (STANDARD)

10′
OPTIONAL: Up to 25′
NOTE: all dig depths are based on a 38″ chassis frame height and 36″ long auger.

FINAL DRIVE:

Special design pinion with a 16″ ring gear.
Steel carrier with replaceable bronze thrust plates and remote bar seals.

HYDRAULIC SYSTEM:

100 G.P.M. tandem gear pump.
2,100 PSI main system pressure.
115 gallon oil reservoir.
In tank suction strainers
In line return filter

BOOM LEVELING: (STANDARD)

20 DEGREES LEFT
45 DEGREES RIGHT
15 DEGREES OVER VERTICAL
*Options available consult factory for special applications.

TURNTABLE BASE: (STANDARD)

95″ diameter, 4″ ship & car channel rolled ring.
240 degree rotation
120 series chain run threw hydraulic speed reducer.
OPTIONAL:
- #1. 35 Degree Pivot base. 100″ travel with 36″ slide.
- #2. Fixed base

OUTRIGGERS: (STANDARD)

Rear “A” frame
OPTIONAL:

Straight down jacks on rear corners
Two sets of “A” Frame outriggers
Spring lockouts
Out & down front outriggers

PIVOT BASE:

Constructed of 6″ Wide flange I-beam 25 lbs./ft.
Full length greasable main frame guides.

MAIN FRAME:

Constructed of 6″ Wide flange I-beam 25 lbs./ft.
36 inches of In/Out slide travel.

MAST:

6″X 6″X 1/4″ Square tubing

DERRICK:

4 3/4″I.D.X 5 1/4″ O.D. seamless hydraulic honed tubing
35,400 ft./lbs. Crowd force. Maximum
22,900 ft./lbs. Retract force. Maximum

TELESCOPING DERRICK: (OPTIONAL)

6′ Telescoping derrick
9′ Telescoping derrick

POLE GUIDES: (OPTIONAL)

Mechanical linkage fixed pole guides with side rollers.
Mechanical linkage tilting pole guides with side rollers

WINCH: (OPTIONAL)

Planetary winch 10,000 lb. On first wrap.
125′ of 7/16″ wire rope

OIL TANK:

115 Gallon hydraulic reservoir with baffles & suction strainers.
*Location can be altered, consult factory.

DIGGER WEIGHT:

Base weight digger only 12,000 lbs. (Approx.)

CHASSIS OR CARRIER:

84″ Cab to Axle minimum
25,500 GVW Single axle minimum

OTHER OPTIONS:

Paint colors, Hydraulic tool circuits, Water tanks, Auger storage, Tunnel storage, Tool boxes, Trailer hitches, Panel lights, Work lights, Safety lighting, Grounding systems, Auger adapters & extension, Augers, Tooling, Hydraulic tools, Outrigger pads, Wheel chocks.

Why the Highway HM-25?

1. Compact design means it can be mounted on nearly any chassis with a GVW of 25,500 lbs. and up.

2. Remote bar seals reduce the amount of dirt exposed to the bar packings and assures straight alignment into the seals.

3. Steel main carrier with replaceable thrust plates for less maintenance costs.

4. Heavy duty pivot base and main frame provide long machine life without breaking or bending.

5. More options and custom configurations available than the competition.