North Star 45931 User manual

Air Compressor Pump
Item # 45931 & 45932
®
M35983F
OWNER’S MANUAL
Quick Facts
Pump Oil
Replace shipping cap with breather cap (shipped in manual bag).
Check pump oil level before starting.
Use Non-detergent pump oil (item # 35605).
Maximum
RPM
45931: 1450 RPM (700 RPM Minimum)
45932: 1300 RPM (700 RPM Minimum)
Minimum
Horsepower
45931: 9.0 hp gas engine, 5.0 hp electric motor
45932: 13.0 hp gas engine, 7.5 hp electric motor
Displacement
45931: 18.1 CFM
45932: 29.7 CFM
CFM @ 90 psi
45931: 15.9
45932: 26.2
Rotation

2
THANK YOU
Thank you for purchasing a NorthStar compressor pump. Your pump is designed for
long life, dependability, and the top performance you demand. Please take time now to
read through this manual so you can better understand the pump’s safety precautions.
Everyone who uses the pump must read and understand this manual. Enjoy the exceptional
performance of your NorthStar pump.
IMPORTANT
Make certain the operator:
- Reads and understands the manuals pertaining to this tank.
- Is instructed in safe and proper operation of this air compressor tank.
NOTICE
K-BAR Industries Incorporated reserves the right to make improvements in design
and/or changes in specifications at any time without incurring any obligation to install them
on units previously sold.
WARNINGS
ALWAYS bleed pressure from tank before servicing.
ALWAYS use air handling parts that are rated above the maximum allowable working
pressure of the tank.
ALWAYS drain tank daily or after each use. Rusted tanks can cause explosion and
cause severe injury or death.
ALWAYS read your owners manual before operating.
ALWAYS use at least one safety relief valve rated at 200 psi or below.
ALWAYS use an ASME certified air receiver tank.
ALWAYS use Teflon tape on all treads to reduce leaks.
NEVER exceed the nameplate rating of the tank(200 psi working pressure). Exceeding
this rating can cause explosion and cause severe injury or death.
NEVER operate machine without a belt guard in place.
NEVER bypass, modify, or remove safety/relief valves.
NEVER direct air stream at people or animals
NEVER modify or repair tank, obtain replacement from a service center or customer
service at 1-800-270-0810.
NEVER breathe receiver air. Can contain Carbon Monoxide or other contaminants.
Will cause serious injury or death.
NorthStar air compressor tanks are not designed for breathing air.

3
COMPRESSOR LUBRICATION
CAUTION! Do not operate without lubricant or with inadequate lubricant.
Use of compressor without lubricant or inadequate lubricant voids all warranties.
Synthetic Lubricants
Synthetic lubricants are recommended after 50 hour break-in. Compressor life is greatly increased with the
use of synthetic lubricants. CAUTION! If you will be using synthetic lubricant, all downstream piping material
and system components must be compatible.
Suitable Viton, Teflon, Epoxy (Glass Filled), Oil Resistant Alkyd, Fluorosilicone, Flourocarbon, Polysulfide,
2-Component Urethane, Nylon, Delrin, Celcon, High Nitrile Rubber (Buna N. NBR more than 36
Acrylonite), Polyurethane, Polyethylene, Epichlorohydrin, Polyacrylate, Melamine, Polypropylene, Baked
Phenolics, Epoxy, Modified Alkyds
( indicates trademark of DuPont Corporation)
Not Recommended
Neoprene, Natural Rubber, SBR Rubber, Acrylic Paint, Lacquer, Varnish, Polystyrene, PVC, ABS,
Polycarbonite, Cellulose Acetate, Latex, EPR, Acrylics, Phenoxy, Polysulfones, Styrene Acrylonitile
(San), Butyl
Alternate Lubricants.
You may use petroleum-based lubricant that is premium quality, does not contain detergents, contains only
anti-rust, anti-oxidation, and anti-foam agents as additives, has a flashpoint of 440F (227C) or higher, and
has a auto-ignition point of 650F (343C) or higher.
See the petroleum lubricant viscosity table below. The table is intended as a general guide only. Heavy duty
operating conditions require heavier viscosities. Refer specific operating conditions to NorthStar Customer
Service at 1-800-270-0810 Monday - Friday 7:00 AM-5:30 PM, Saturday 7:30 AM-11:30 AM Central Standard
Time.
Temperature around
Compressor
Viscosity Grade
ISO
SAE
Below 40F (4C)
60
20
40F to 80F
(4C to 27C)
100
30
80F to 100F
(27C to 37C)
150
40
Pump Capacities.
Refer to the following table for crankcase capacity
Item number
Crankcase Capacity
45931
48 oz.
45932
72 oz.

4
45931 Exploded View
Item
Description
Part #
Qty
1
Pump Head
AB4961400
1
2
Head Bolt (M8 x 55mm SHCS)
AB9101744
6
3
Intercooler Gasket
AB4650600
2
4
Intercooler/Aftercooler Bolt
(M8 x 20mm SHCS)
AB9101254
8
5
Gasket
AB3970200
2
6
Aftercooler
AB2070100
1
7
Reducer
AB9050282
1
8
Head Gasket
AB4650400
1
9
Valve Plate Assy.
AB4940050
1
10
Cylinder Gasket
AB4950300
1
11
Cylinder
AB4930000
1
12
Frame Gasket
AB4950200
1
13
Cover N.D.E.
AB2060690
1
14
Bearing Cover Gasket
AB2050500
2
15
Bearing
AB9170030
2
16
Oil Sight Glass
AB9022001
1
17
Crankcase
AB4960101
1
18
Cylinder Bolt
AB9107254
6
19
Crankcase Plug
AB9101164
1
20
Crankcase Bolt (M5 x 15 HHCS)
AB9114271
8
21
Crankcase Pan
AB4961301
1
22
Crankcase Gasket
AB4950101
1
23
Crankshaft
AB4961200
1
24
Nut
AB9128234
4
25
Oil Seal
AB9163010
1
26
Cover D.E.
AB2060590
1
Item
Description
Part #
Qty
27
Cover Bolt (M6 x 15 SHCS)
AB9101094
8
28
Flywheel, 350 mm
AB3600100
1
29
Flywheel washer
AB9004008
1
30
Screw, Reverse Thread
AB9110014
1
31
Half Bearing
AB9013011
4
32
Connecting Rod
AB4011100
2
33
Pin
AB4621200
1
34
H.P. Piston
AB4621100
1
35
Circlip
AB9140050
4
36
Piston Ring ROF
AB9020086
2
37
Piston Ring ROS
AB9020053
1
38
Piston Ring AC
AB9020023
1
39
Rod Bolt
AB9106244
4
40
L.P. Piston
AB4922100
1
41
Pin
AB4922200
1
42
Piston Ring ROF
AB9020057
1
43
Piston Ring ROS
AB9020056
1
44
Piston Ring AC
AB9020055
1
45
Oil fill plug
AB9024010
1
46
Intercooler
AB4662010
1
47
Safety Valve
AB9049064
1
48
Air Filter Assy.
35603
1
49
Air Filter
35409
1
50
Intake Manifold
35604
1
Complete Gasket Kit
AB4950055
1
00863

5
45932 Exploded View
Item
Description
Part #
Qty
1
Pump Head
AB6061401
1
2
Head Bolt (M10 x 55mm SHCS)
AB9101754
6
3
Air Filter
35409
1
4
Air Filter Assy.
35404
1
5
Intake/Aftercooler Gasket
AB5070200
1
6
Intake Elbow
AB9083227
1
7
Intake/Aftercooler Bolt
(M10 x 20 SHCS)
AB9101264
4
8
Safety Valve
AB9049011
1
9
Aftercooler
AB5070100
1
10
Reducer
AB9050284
1
11
Head Gasket
AB6050400
1
12
Valve Plate Assy.
AB6040051
1
13
Cylinder Gasket
AB6050300
1
14
Cylinder, Cast Iron
AB6030000
1
15
Upper Crankcase Gasket
AB6050200
1
16
Cover N.D.E.
AB5061690
1
17
Bearing Cover Gasket
AB5050500
1
18
Bearing
AB9170020
1
19
Oil Sight Glass
AB9022003
1
20
Crankcase
AB6061100
1
21
Cylinder Bolt (M10 x 40mm SHCS)
AB9101324
6
22
Crankcase Plug
AB9101164
1
23
Oil Drain Stub
AB9053201
1
24
Crancase Bolt (M6 x 20mm HHCS)
AB9114262
12
25
Crankcase Pan
AB6061301
1
26
Lower Cankcase Gasket
AB6050101
1
27
Crankshaft
AB6061200
1
28
Rod Nut
AB9128234
4
Item
Description
Part #
Qty
29
Oil Seal
AB9163030
1
30
Cover D.E.
AB6061590
1
31
Cover Bolt (M6 x 15mm SHCS)
AB9101154
8
32
Flywheel, 430 mm
AB5000100
1
33
Flywheel washer
AB9004009
1
34
Screw, Reverse Thread
AB9110024
1
35
Half Bearing
AB9013014
4
36
Connecting Rod
AB6011101
2
37
Rod Bolt
AB9106244
4
38
Pin, High Pressure
AB6021200
1
39
H.P. Piston, Aluminum
AB6021100
1
40
Piston Ring ROF
AB9020073
2
41
Piston Ring ROS
AB9020041
1
42
Piston Ring AC
AB9020011
1
43
Circlip
AB9140060
4
44
L.P. Piston, Aluminum
AB6022100
1
45
Pin, Low Pressure
AB6022200
1
46
Piston Ring ROF
AB9020076
1
47
Piston Ring ROS
AB9020046
1
48
Piston Ring AC
AB9020016
1
49
Oil fill plug
AB9024006
1
50
Intercooler
AB5262010
1
51
Safety Valve
AB9049064
1
52
Intercooler Bolt (M8 x 20 mm SHCS)
AB9101254
4
53
Intercooler Gasket
AB5050600
2
54
Front Bearing Cover Gasket
AB6050500
1
55
Front Main Bearing
AB9170090
1
Complete Gasket Kit
AB6050057
1

6
Air Compressor Exploded View
Note: We have included this exploded view of one of our air compressors to aid you in re-building your air
compressor. You can order any of the parts seen below by calling our Product Support at 1-800-270-0810.
Item
Description
Item
Description
Item
Description
1
Air Filter
23
Strain Relief (8-3 Rt Angle)
45
Warning Decal
2
Air Filter Assembly
24
1/2" NPT Elbow
46
Instruction Decal
3
Air Compressor
25
1/2" Ball Valve
47
Power Cord (8-3, S00W)
4
Belt Guard Mount Bracket
26
Name Plate
48
1/4" Copper Tube
5
Belt Guard
27
80 Gal Tank, Red
49
1/4" Compression Nut
6
Rotating Equip. Decal
28
1/4" Rt Angle Connection
50
1/4" Compression Sleeve
7
Guard Bottom Bracket
29
1/4" Diameter HDPE Tube
51
1/8" MPT x 1/4" Comp. Fitting
8
Controller Bracket
30
1/4" Straight Connection
52
Check Valve
9
1/4” Female Terminal
31
1/4" NPT Bulkhead Fitting
53
3/4" MPT x 5/8" Comp. Fitting
10
Strain Relief (12-3 Straight)
32
1/4" NPT Water Drain
54
5/8" Compression Sleeve
11
Wire Assembly (R4)
33
Warning Decal
55
5/8" Compression Nut
12
Motor Relay
34
Features Decal
56
5/8" Copper Tube
13
Grounding Post
35
1/4" NPT Hex Nipple
57
45 deg 5/8" Comp x 1/2" MPT Fitting
14
Motor Controller
36
2" Air Gauge
58
Wire Nut
15
Wire Assembly (R2)
37
1/4" NPT Plug
59
Strain Relief
16
Wire Assembly (B3)
38
Pressure Switch/Unloader
60
Ring Terminal
17
Controller Box
39
Dome Cap
61
5 HP Magnetek Motor
18
Fuse
40
Top Plate
62
Sheave, AK54K
19
Fuse Holder
41
Safety Relief, 200 psi
63
Bushing
20
Bi-metal Heater
42
Strain Relief (12-3 Rt. Angle)
64
Belt, A55
21
Wire Assembly (R3)
43
Fork Terminal, 12
22
Overload Relay
44
Power Cord (12-3, S00W)

7
Limited Warranty
Dear Valued Customer:
The NorthStar Product you just purchased is built with the finest material and craftsmanship. Use this product
properly and enjoy the benefits from its high performance. By purchasing a NorthStar product, you show a desire for quality
and durability.
Like all mechanical equipment this unit requires a due amount of care. Treat this unit like the high quality piece of
machinery it is. Neglect and improper handling may impair its performance. Please thoroughly read the instructions and
understand the operation before using your product.
Limited Warranty
NorthStar shall warranty any piece of equipment manufactured, or parts of equipment manufactured, to be free from defects
in material or workmanship for a period of 1 year from the date of purchase by user. This warranty applies to the original
purchaser of the equipment and is non transferable. Verification of purchase is the responsibility of the buyer. Parts will be
replaced or repaired at no charge, except when the equipment has failed due to lack of proper maintenance. Any misuse,
abuse, alteration or improper installation or operations will void warranty. Determining whether a part is to be replaced or
repaired is the sole decision of NorthStar.
NOTE: Some services performed by parties other than NorthStar may void warranty.
This warranty covers parts only. It will not provide for replacement of complete products due to defective
parts. Components not manufactured by NorthStar such as engines are guaranteed by their
manufacturer and can be serviced at factory-authorized locations near you. Any costs incurred due to
replacement or repair of items outside of a NorthStar approved facility is the responsibility of the buyer
and not covered under warranty. NorthStar can supply you with the service center location in your area.
This warranty specifically excludes the following; failure of parts due to damage caused by accident, fire, flood, windstorm,
acts of God, applications not approved by NorthStar in writing, corrosion caused by chemicals, use of replacement parts
which do not conform to manufacturer’s specifications, and damage caused by vandalism. Additional exclusions: loss of
running time, inconvenience, loss of income, or loss of use, including any implied warranty of merchantability of fitness for a
specific use.
Warranty does not cover items subject to normal wear such as tires, receptacles or any part subject to direct physical contact
by the public. This warranty does not cover any personal injury or damage to surrounding property caused by failure of any
part.
This warranty is in lieu of any other warranty expressed or implied and NorthStar assumes no other responsibility or liability
outside that expressed within this warranty.
Please fill in the following information and have it on hand when you call in a warranty claim.
Customer Number: ______________________________________________________________
Date of Purchase: _______________________________________________________________
NorthStar Serial Number: ________________________________________________________
Item Number: __________________________________________________________________

8
®
Manufactured by
Northern Tool + Equipment Co.,
2800 SouthCross Drive West
P.O. Box 1499 Burnsville, MN 55337-0499

9