NORTHSTAR Hydraulic Earth Auger Owner's manual

M191180L.5

ITEM NUMBER: 191180

SERIAL NUMBER:

Owner’s Manual

Post Hole Digger: Hydraulic powered, towable earth auger.

Any Questions, Comments, Problems or Parts Orders

Call NorthStar Product Support 1-800-270-0810

2

Hazard Signal Word Definitions

3

Table of Contents

Important Safety Rules .................................................. 4-5

Warning Label Locations .............................................. 6

Unpacking ......................................................................... 7

Fastener Identification ....................................................... 8

Assembly Instructions ....................................................... 9-17

Filling the Hydraulic Tank ................................................. 18

Machine Components ........................................................ 19

Operation Instructions ................................................... 20-25

Operating Zones .................................................. 20

Attaching an Auger ............................................. 21

Proper Operation of the Post Hole Digger ........... 22-23

Using the Telescoping Auger Extension .............. 24

Moving and Towing the Post Hole Digger .......... 25

Maintenance and Storage .............................................. 26-28

Maintenance Chart and Storage Procedures ........ 26

Replacing Auger Teeth and Pilot Bits…………... 27

Adjusting the Linkage ......................................... 28

Troubleshooting ................................................................. 29

Specifications and Accessories........................................... 30

Parts Explosion .................................................................. 31

Limited Warranty.................................................................33

4

Important Safety Rules

5

Important Safety Rules

Save These Instructions

6

Warning Label Locations



01545



7

Unpacking

Closely inspect all contents in the shipping carton.

- If you have missing or damaged components: Contact Product Support at

1-800-270-0810.

8

Fastener Identification

9

Assembly Instructions

1. Wheel assembly and hydraulic filter attachment.

- Remove axle-shipping caps and slide wheels onto axles.

- Spin jam nut onto axle until snug against the wheel. Loosen nut 1/8 turn until nut lines up

with the cross hole in the axle.

- Insert cotter pin through cross-hole in axle and bend ends around jam nut with pliers.

- Use a soft mallet to pound on dust caps.

- Coat hydraulic filter seal with hydraulic oil, then thread hydraulic filter into place.

10

Assembly Instructions

2. Attach boom.

- Line up holes on boom with holes in axle.

- Attach boom to axle with (6) 7/16 x 1-1/4" bolts and (6) 7/16 nuts.

- Tighten to 45 ft-lbs.

11

Assembly Instructions

3. Attach hose retaining bracket.

- Line up holes in handle with holes in hose retaining bracket.

- Slide retaining bracket over wire loom.

- Fasten retaining bracket to handle with (2) 1/4 x 3/4" bolts and (2) 1/4 nuts.

- Tighten to 10 ft-lbs.

12

Assembly Instructions

4. Feed hydraulic hoses and wires through the boom.

- For this step, it is a good idea to prop the handle assembly on a bench while you feed

the bundle of hoses and wires through the boom.

13

Assembly Instructions

5. Attach handle assembly to boom.

- Slide handle pivot tube into the boom.

- Install 3/8 x 1-1/2” bolt and 3/8 washer through the boom pivot bracket and into the nut

welded to the handle assembly.

- Tighten bolt until handle is secure and does not rotate.

- Thread 3/8 nyloc nut onto the end of the 3/8 x 1-1/2” bolt. Do not tighten the nyloc nut

against the weld nut; the nyloc nut acts as a stop so that the 3/8 x 1-1/2” bolt cannot fall

out or be loosened too far when making adjustments.

14

Assembly Instructions

6. Connect hydraulic hoses.

- Make sure the hoses and protective sleeving form a big, vertical loop; this will help the

engine pivot and stay level.

- Attach hydraulic hose with red zip-tie to pump outlet.

- Attach hydraulic hose with no zip-tie to the hydraulic filter.

- Tuck wires and loom under the engine mount plate.

15

Assembly Instructions

7. Wire connections.

- Locate wire bundle and gas tank mount stud and nut on engine.

- Pull loom from under engine plate into position for attachment.

- Remove gas tank mount nut, attach white wire to stud, and replace nut.

- Locate snap-in plug in wire bundle and connect to black wire snap-in receptacle.

16

Assembly Instructions

8. Attach breather cap and towing coupler.

- Push the breather cap onto the hydraulic oil fill tube.

- Fasten the towing coupler to the axle/reservoir/engine assembly with (2) 1/2 x 3” bolts and

(2) 1/2 nyloc nuts. Tighten to 60 ft-lbs.

- Attach the towing chains to the towing chain mount plate with (2) 3/8 x 1-1/4” bolts, (2) 3/8

washers and (2) 3/8 nyloc nuts. Bolt the first link in each towing chain. Tighten until snug.

17

Assembly Instructions

9. Attach the auger coupler.

- Locate the end of the auger coupler with two holes. This is the end of the auger coupler that

points up into the motor shaft.

- Slide auger coupler into motor shaft and lock in place with a 3/8 x 2-1/2” cotterless hitch pin.

- Place 3/8 x 1” cotterless hitch pin in its storage location. This is the travel pin and will be used

for moving and towing the posthole digger.

18

Filling the Hydraulic Tank

1.) Remove breather cap from the hydraulic oil fill tube.

2.) Fill hydraulic tank with 10 wt hydraulic oil (Northern Item #4040)

approximately one inch from the top of the tank.

3.) Fill engine crankcase with SAE 30 motor oil and fill gas tank with

gas (see engine manual). Pull engine recoil rope 3-4 times to

prime the pump before actually starting the engine.

4.) Start the engine and run at slow idle.

5.) Pull right trigger until motor shaft spins smoothly.

6.) Stop the engine. Relieve system pressure by moving the trigger

back and forth while the engine is OFF. Check the hydraulic oil

level again and fill to one inch from the top of the tank. Replace

breather cap.

7.) Start engine and run at full speed.

8.) Pull left trigger until motor shaft spins smoothly.

9.) Stop the engine and relieve system pressure. Check hydraulic oil level again. Add oil if

needed to reach the final oil level of 1 inch from the top of the tank. Total hydraulic oil

capacity is 4 gallons.

10WT AW32

19

Machine Component Identification

1.) Towing Coupler. Attaches the post hole digger to your vehicle.

2.) Engine. The air-cooled engine powers the hydraulic system.

3.) Hydraulic Oil Fill Tube. Used for adding or checking hydraulic oil.

4.) Hydraulic Pump. The hydraulic pump moves the hydraulic oil through the system.

5.) Hydraulic Filter. The hydraulic filter keeps the hydraulic oil clean.

6.) Engine Pivot. The engine bracket pivots so the engine can remain level while digging holes.

7.) Hydraulic Reservoir. The hydraulic reservoir holds the hydraulic oil used in the hydraulic

system.

8.) Strainer. The strainer pre-cleans the hydraulic oil before it enters the hydraulic system.

9.) Control Valve. The control valve directs the hydraulic oil to the hydraulic motor.

10.) Work port Hoses. The work port hoses bring the hydraulic oil from the control valve to

the hydraulic motor.

11.) Pivot Bolt. Use the pivot bolt to rotate the handle and auger when digging on a slope.

12.) Auger Handle. Use the handle to move the auger into position.

13.) Hydraulic Motor. The hydraulic motor spins the auger clockwise or counter-clockwise for

digging down or reversing up out of holes.

14.) Trigger. The trigger is used to start, stop, and reverse the auger.

15.) Emergency Stop Switch. The operator can turn the engine off using the emergency stop

switch.

20

Operation Instructions

Operating Zones

Serious accidents can occur when other people are allowed into the operating zones or

when the machine is operated from somewhere other than the operating zones.

Keep all bystanders 20 feet from the posthole digger and never operate the machine from

a position other than the defined operating zones.

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NORTHSTAR Hydraulic Earth Auger Owner's manual

NORTHSTAR Hydraulic Earth Auger Owner's manual

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