Central Pneumatic 34202 User manual

40LB.PRESSURIZED
SANDBLASTER
ASSEMBLYandOPERATINGINSTRUCTIONS
3491 Mission Oaks Blvd. / Camarillo, CA 93011
Copyright © 1997 by Harbor Freight Tools®. All rights reserved.
No portion of this manual or any artwork contained herein may be reproduced in any
shape or form without the express written consent of Harbor Freight Tools.
For technical questions and replacement parts, please call 1-800-444-3353.

SPECIFICATIONS
Capacity: 40 lbs.
Working Pressure 60-125 PSI
Delivery Rate 6-25 CFM
Overall Dimensions 33.5" x 18.75" x 13"
Weight: 57 lbs.
SAVE THIS MANUAL
You will need the manual for the safety warnings and cautions, assembly instructions, operating
procedures, maintenance procedures, trouble shooting, parts list, and diagram. Keep your invoice
with this manual. Write the invoice number on the inside of the front cover. Keep both this manual
and your invoice in a safe, dry place for future reference.
SAFETY WARNING & CAUTIONS
WARNING: When using pneumatic equipment, basic safety precautions should always be followed
to reduce the risk of personal injury and hazards due to over pressurization. READ ALL
INSTRUCTIONS BEFORE USING THIS TOOL!
1. KEEP WORK AREA CLEAN. Cluttered areas invite injuries.
2. OBSERVE WORK AREA CONDITIONS. Do not use tools in damp, wet, or poorly lit locations.
Don’t expose to rain. Keep work area well lit. Do not use electrically powered air compressors
in the presence of flammable gases or liquids.
3. KEEP CHILDREN AWAY. Children must never be allowed in the work area. Do not let them
handle machines, tools, or hoses.
4. STORE IDLE EQUIPMENT. When not in use, tools must be locked up in a dry location to
inhibit rust. Always lock up tools and keep out of reach of children.
5. DO NOT FORCE THE TOOL. It will do the job better and more safely at the rate for which
it was intended. Do not use inappropriate attachments in an attempt to exceed the tool’s
capacities.
6. USE THE RIGHT TOOL FOR THE JOB. Do not attempt to force a small tool or attachment
to do the work of a larger industrial tool. Do not use a tool for a purpose for which it was not
intended.
7. DRESS PROPERLY. Do not wear loose clothing or jewelry as they can be caught in moving
parts. Non-skid footwear is recommended. Wear restrictive hair covering to contain long
hair. Always wear the hood (included), a dust mask, and heavy duty canvas gloves.
8. USE EYE AND EAR PROTECTION. Always wear ANSI approved chemical splash
goggles when working with chemicals. Always wear ANSI approved impact safety goggles
at other times. Wear a full face shield if you are producing metal filings or wood chips.
Wear and ANSI approved dust mask or respirator when working around metal, wood, and
chemical dusts and mists.
Page #2 -- SKU 34202 REV 12/05

9. DO NOT ABUSE THE POWER CORD. Do not yank compressor’s cord to disconnect it
from the receptacle. Do not carry tools by the cord.
10. DO NOT OVERREACH. Keep proper footing and balance at all times. Do not reach over
or across running machines.
11. MAINTAIN TOOLS WITH CARE. Keep tools sharp and clean for better and safer
performance. Follow instructions for lubricating and changing accessories. Inspect
compressor’s cord periodically and, if damaged, have them repaired by an authorized
technician. Inspect all hoses for leaks prior to use. The handles must be kept clean, dry,
and free from oil and grease at all times.
12. REMOVE ADJUSTING KEYS AND WRENCHES. Make it a habit to check that keys and
adjusting wrenches are removed from the tool or machine work surface before plugging it
in.
13. AVOID UNINTENTIONAL STARTING. Make sure the nozzle valve is in the off position
when not in use, and before plugging in air compressor.
14. STAY ALERT. Watch what you are doing, use common sense. Do not operate any tool
when you are tired.
15. CHECK DAMAGED PARTS. Before using any tool, any part that appears damaged
should be carefully checked to determine that it will operate properly and perform its
intended function. Check for alignment and binding of moving parts; any broken parts or
mounting fixtures; and any other condition that may affect proper operation. Any part that is
damaged should be properly repaired or replaced by a qualified technician. Do not use the
tool if any switch does not turn on and off properly.
16. REPLACEMENT PARTS AND ACCESSORIES. When servicing, use only identical
replacement parts. Use of any other parts will void the warranty. Only use accessories
intended for use with this tool. Approved accessories are available from Harbor Freight
Tools.
17. DO NOT OPERATE TOOL IF UNDER THE INFLUENCE OF ALCOHOL OR DRUGS.
Read warning labels on prescriptions to determine if your judgment or reflexes are
impaired while taking drugs. If there is any doubt, do not operate the tool.
18. DRAIN COMPRESSOR EVERY DAY. Do not allow moisture to build up inside the
compressor. Do not allow compressor to sit pressurized for longer than one hour.
19. MAKE SURE ALL EQUIPMENT IS RATED TO THE APPROPRIATE CAPACITY. Make
sure that regulator is set at no higher than 125 PSI.
20. PERIODICALLY CHECK THE ABRASIVE MEDIUM DELIVERY EQUIPMENT. All
equipment that comes in contact with the abrasive medium after it leaves the pressure
tank is subjected to the sandblasting action so will wear out more quickly than other
components.
21. RELEASE THE AIR PRESSURE OF THE TANK BEFORE OPENING. Open the air
supply valve and the nozzle to release pressure. Make sure pressure gauge reads “0”
before opening.
Page #3 -- SKU 34202

22. MAINTAIN CORRECT AIR PRESSURE WHENEVER WORKING. Do not allow pressure
to exceed 125 PSI. If the safety valve does not release excess air pressure, stop all work
and use the air compressor to release pressure in the tank. Do not attempt any repairs to
the Sandblaster until its gauge reads “0”.
AIR/SAND SUPPLYREQUIREMENTS
Hose Hose Nozzle Compressor CFM Sand Use
ID Length ID HP @ 125 PSI Per Hour
3/8" 50 ft. 0.1" 2 6 60 lbs.
3/8" 25 ft. 0.125" 4 12 100 lbs.
1/2" 50 ft. 0.15" 7 20 150 lbs.
1/2" 25 ft. 0.175" 10 25 200 lbs.
UNPACKING
When unpacking, sort all pieces and check according to the parts list and diagram to make sure all
parts are included. All sizes listed are approximate. All Valve Assemblies are individually packed. If
any parts are missing or broken, please call Harbor Freight Tools at the number on the cover of this
manual.
Page #4 -- SKU 34202

ASSEMBLY
NOTE: Use Teflon® Pipe Tape on all threaded joints. Make sure all joints are
securely tighten.
Intake Manifold
Refer to Figure 1.
Step1: Get out the INTAKE MANIFOLD (#14),
PRESSURE GAUGE (#15), BRASS
THROTTLING VALVE (#18A), 3/8" 1/4"
NIPPLE CONNECTOR (#20), and JOINT
PIPE (#13).
Step2: Attach the PRESSURE GAUGE to the
top of the INTAKE MANIFOLD. Turn
PRESSURE GAUGE so that it’s face is
over the lower side hold of the INTAKE
MANIFOLD.
Step3: Attach the BRASS THROTTLING VALVE to the bottom of the INTAKE MANIFOLD.
Step4: Attach the 3/8" end of the NIPPLE CONNECTOR to the other end of the BRASS
THROTTLING VALVE.
Step5: Attach the JOINT PIPE to the lower side hole of the INTAKE MANIFOLD.
Pressure
Gauge
(#15)
Intake
Manifold
(#14)
Brass
Throttling Valve
(#18A)
Nipple
Connector
(#20)
Joint Pipe
(#13)
Figure 1 — Intake Manifold Assembly
Page #5 -- SKU 34202

Water Trap
Refer to Figure 2.
Figure 2 — Water Trap Assembly
Step1: Get out the WATER TRAP (#17), two 3/8" NIPPLE CONNECTORS (#16), the BRASS
AIR SUPPLY VALVE (#18), and the MALE/FEMALE ADAPTER (#19).
Step2: Attach the 3/8" NIPPLE CONNECTORS to either side of the WATER TRAP.
Step3: On the top of the WATER TRAP is an arrow. Attach the BRASS AIR SUPPLY VALVE to
the NIPPLE CONNECTOR that the arrow is facing away from.
Step4: Attach the MALE/FEMALE ADAPTER to the BRASS AIR SUPPLY VALVE.
Brass Air
Supply Valve
(#18)
Male/Female
Adapter
(#19)
Nipple Connector
(#16)
Water Trap
(#17)
Page #6 -- SKU 34202

Nozzle Shut Off Valve
Refer to Figure 4.
Step1: Get out the
HOSE ADAPTER
(#25), the STEEL
SHUT OFF VALVE
(#18C), a NIPPLE
CONNECTOR (#16),
the GASKET (#26),
the desired size
NOZZLE (#27A-D),
and the NOZZLE CAP
NUT (#28).
Step2: Put the front of the NOZZLE through the NOZZLE CAP NUT.
Step3: Attach the NOZZLE CAP NUT to the NIPPLE CONNECTOR with the GASKET between
the NIPPLE CONNECTOR and the NOZZLE. The flat end of the GASKET should face the
NIPPLE CONNECTOR.
Step4: Attach the other end of the NIPPLE CONNECTOR to one side of the STEEL SHUT OFF
VALVE.
Refer to Figure 3.
Step1: Get out the TANK (#1), the SAND
CONTROL VALVE (#18B), two NIPPLE
CONNECTORS (#16), and the SAND
OUTLET MANIFOLD (#22).
Step2: Attach one of the NIPPLE
CONNECTORS to the bottom of the
TANK (#1).
Step3: Attach the SAND CONTROL VALVE to
the other end of the NIPPLE
CONNECTOR.
Step4: Attach the other NIPPLE CONNECTOR
to the other end of the SAND CONTROL
VALVE.
Step5: Attach the other end of the NIPPLE
CONNECTOR to the side hole of the
SAND OUTLET MANIFOLD.
Tank
(#1)
Nipple
Connector
(#16)
Sand Control
Valve
(#18B)
Sand Outlet
Manifold
(#22)
Hose Adaptor
(#25)
Steel Shut
Off Valve
(#18C)
Nipple
Connector
(#16)
Nozzle
(#27A-D)
Nozzle Cap
Nut
(#28)
Gasket
(#26)
Sand Control Valve
Figure 3 — Sand Control Valve Assembly
Figure 4 — Nozzle Shut Off Valve
Page #7 -- SKU 34202

Step5:Attach the HOSE ADAPTER to the other end of the STEEL SHUT OFF VALVE.
Sand Control Valve/ Nozzle Shut Off Valve
Refer to Figure 5.
Sand Control
Valve Assembly
Sand Hose
Nozzle Shut Off
Valve Assembly
Hose Clamp
(#23)
Figure 5 — Sand Control Valve / Shut Off Valve Assembly
Step1: Get out the Sand Control Valve & Nozzle Shut Off Valve Assemblies, the SAND HOSE
(#24), and the two HOSE CLAMPS (#23).
Step2: Slide the HOSE CLAMPS over either side of the SAND HOSE. Do not tighten yet.
Step3: Slide one end of the SAND HOSE onto the Nozzle Shut Off Valve Assembly’s HOSE
ADAPTER (#25). Tighten the HOSE CLAMP very securely.
Step4: Slide the other end of the SAND HOSE onto the Sand Control Valve Assembly’s SAND
OUTLET MANIFOLD (#22). Tighten the HOSE CLAMP very securely.
Page #8 -- SKU 34202

Top Assembly
Refer to Figure 6.
Tank
(#1)
Nipple
Connector
(#16)
Nipple
Connector
(#16)
Air Hose
(#21)
Gasket
(#11)
Air Cap
(#12)
Joint Pipe
(#13)
Figure 6 — Top Assembly
Step1: Get the Intake Valve Assembly, the Water Trap Assembly, the Tank Assembly, the TANK
CAP (#12), the O-RING (#11), and the AIR HOSE (#21).
Step2: Attach the Water Trap Assembly’s NIPPLE CONNECTOR (#16) to the upper side
INTAKE MANIFOLD (#14).
Step3: Attach the JOINT PIPE (#13) to the upper side port of the TANK (#1).
Step4: Put the O-RING into the fill port of the TANK.
Step5: Screw the TANK CAP onto the fill port of the TANK.
Step6: Attach the female end of the AIR HOSE to the BRASS THROTTLING VALVE’S (#18A)
NIPPLE CONNECTOR (#16).
Step7: Attach the male end of the AIR HOSE to the SAND OUTLET MANIFOLD(#22),
underneath the TANK.
Page #9 -- SKU 34202

Handle Bars
Refer to Figure 7.
Handle Grip
(#7)
Handle Bar
(#6)
Screw
(#8)
Washer
(#31)
Nut
(#9)
Figure 7 — Handle Bar Assembly
Step1: Get out the two HANDLE BARS (#6), the two HANDLE GRIPS (#5), the four SCREWS
(#8), four NUTS (#9), and four WASHERS (#31).
Step2: Slide the HANDLE GRIPS onto the HANDLE BARS.
Step3: Attach both HANDLE BARS to the TANK (#1) using the four SCREWS, NUTS, and
WASHERS. The HANDLE BARS must curve back and the holes in their bottoms must
be parallel to each other. The WASHERS go between the NUTS and the TANK.
Right Handle
(#6-R)
Left Handle
(#6-L)
REV 01/01Page #10 -- SKU 34202

Wheels and Foot
See Figure 8.
5
3
2
4
3
3
2
Figure 8 - Wheel and Foot Attachment
Step 1: Get out the two WHEELS (#2), the three COTTER PINS (#3), the FOOT (#4) and the
AXLE (#5).
Step 2: Attach the FOOT to the TANK (#1) using one of the COTTER PINS.
Step 3: Attach one of the WHEELS to the AXLE using one of the COTTER PINS.
Step 4: Slide the AXLE through the hole in the bottom of the two HANDLE BARS (#6).
Step 5: Attach the other WHEEL to the AXLE using the remaining COTTER PINS.
Safety Valve
Step 1: Screw the SAFETY VALVE (#10) into the hole in the top of the TANK (#1).
Page #11 -- SKU 34202

OPERATIONS
Loading Abrasives
Step 1: Check to insure the abrasives are dry and clean
so that they do not clog the unit.
Step 2: Close the AIR SUPPLY VALVE (#18) by turning it to
the horizontal position.
Step 3: Open the NOZZLE SHUT OFF VALVE (#18C) by turning it to the vertical position.
Step 4: Make sure the PRESSURE GAUGE (#15) reads “0”.
Step 5: Remove the TANK CAP (#12).
Step 6: Using the FUNNEL (#29), pour the selected
abrasive medium into the TANK (#1). Do not fill more than
3/4 of the TANK. If humidity in your region is 90% or more,
only fill the tank 1/2 way, and check the WATER TRAP (#17) more frequently.
Step 7: Close the TANK CAP.
Step 8: Close the NOZZLE SHUT OFF VALVE and open the AIR SUPPLY VALVE.
Step 9: Check for leaks at the TANK CAP as pressurization begins.
Step 10: Open the NOZZLE SHUT OFF VALVE to begin blasting.
Note:
Place your Air Compressor in
another room to prevent
damage to it.
Warning!
Always wear your hood, dust
mask, and heavy-duty canvas
gloves when operating the
Sand Blaster.
Page #12 -- SKU 34202

Item# Description Qty Item# Description Qty
1 Tank 1 18B 3/8" Steel Sand Control Valve 1
2 Wheel 2 18C 3/8" Steel Shut Off Valve 1
3 Cotter Pin 3 19 Male/Female Adapter 1
4 Foot 1 20 3/8" 1/4" Nipple Connector 1
5 Axle 1 21 Air Hose 1
6 * Handle Bar 2 22 Sand Outlet Manifold 1
7 Handle Grip 2 23 Hose Clamp 2
8 Pan Screw 4 24 Sand Hose 1
9 Hex Nut 4 25 Hose Adapter 1
10 Safety Valve 1 26 Gasket 1
11 O-Ring 1 27A 9/64" Nozzle 1
12 Tank Cap 1 27B 1/8" Nozzle 1
13 Joint Pipe 1 27C 7/64" Nozzle 1
14 Intake Manifold 1 27D 3/32" Nozzle 1
15 Pressure Gauge 1 28 Nozzle Cap Nut 1
16 3/8" Nipple Connector 5 29 Funnel 1
17 Water Trap 1 30 Hood 1
18 3/8" Brass Air Supply Valve 1 31 Washer 1
18A 3/8" Brass Throttling Valve 1 32 Instruction Manual 1
MAINTENANCE
1. Pay particular attention to the SAND HOSE (#24), the NOZZLE SHUT OFF VALVE (#18C),
and the NOZZLES (#27A-D) as they will wear out much more quickly than the other
pieces.
2. The SAND HOSE needs replacing when it’s side walls develop leaks or show blisters in
the surface. Do not use if any of these problems are present.
PARTS LIST
* Note: Left Handle is #6-L, Right Handle is #6-R.
REV 01/01Page #13 -- SKU 34202

19
16
16
17
15
14
18A
20
18
13
7
8
9
3
5
21
14
2
1
24
23
28
27A-D
26
16
18C
25
16
18B
16
22
23
31
12
11
10
6
3
PARTS DRAWING
Page #14 -- SKU 34202