operating manual & parts list PR736, PR738 and PR7310
6″, 8″ & 10″
BENCH GRINDER
Read carefully and follow all safety rules and operating instructions before
first use of this product.
36626.00-0912
PR736, PR738 and PR7310
DESCRIPTION
PRM Bench Grinders are equipped with a totally enclosed ball
bearing motor. Armature assembly is dynamically balanced for
smooth operation. Motor housing is compact so long pieces of
work can press against both wheels without touching the motor
frame. Removable wheel guards allow for easy changing of wheels.
Two-way tool rests are adjustable for wheel wear and angle grinding. Grinders come complete with spark guards, safety eyeshields
and dust collection hose. (Dust Collection hose not included with
PR736).
UNPACKING
Check for shipping damage. If damage has occurred, a claim must
be filed with the carrier immediately. Check for completeness.
Immediately report missing parts to dealer.
To be certain the grinding wheels have not been damaged in shipment, strike the edges slightly with a metal object. A ringing sound
indicates a good wheel, but a dull noise may signal a fracture.
WARNING: If you suspect a wheel of being fractured, replace it
immediately. Fractured wheels may shatter, causing serious injury.
SPECIFICATIONS
PR736 - 6” Bench Grinder
Horsepower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120/240
Amperes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.5/1.75
Hertz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Single
RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3450
Rotation (viewed from left side) . . . . . . . . . . . . . . . . . . . . . . . . .Clockwise
Wheel diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6”
Wheel bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PR738 - 8” Bench Grinder
Horsepower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120/240
Amperes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7.0/3.5
Hertz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Single
RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3450
Rotation (viewed from left side) . . . . . . . . . . . . . . . . . . . . . . . . .Clockwise
Wheel diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8”
Wheel bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PR7310 - 10” Bench Grinder
Horsepower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120/240
Amperes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10.0/5.0
Hertz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Single
RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1725
Rotation (viewed from left side) . . . . . . . . . . . . . . . . . . . . . . . . .Clockwise
Wheel diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10”
Wheel bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1”
1
5
SAFETY RULES
WARNING: For your own safety, read operating instructions man-
ual before operating tool.
CAUTION: Always follow proper operating procedures as defined in
this manual even if you are familiar with use of this or similar tools.
Remember that being careless for even a fraction of a second can
result in severe personal injury.
WARNING: Some dust created by power sanding, sawing, grind-
ing, drilling and other construction activities contains chemicals
known to cause cancer, birth defects or other reproductive harm.
Some examples of these chemicals are:
• Lead from lead-based paints.
• Crystalline silica from bricks and cement and other masonry
products.
• Arsenic and chromium from chemically-treated lumber.
Your risk from these exposures vary, depending on how often you
do this type of work. To reduce your exposure to these chemicals:
work in a well ventilated area and work with approved safety
equipment. Always wear OSHA/NIOSH approved, properly fitting
face mask or respirator when using such tools.
BE PREPARED FOR JOB
• Wear proper apparel. Do not wear loose clothing, gloves, neckties, rings, bracelets or other jewelry which may get caught in
1
/3
/2”
3
/4
/8”
moving parts of machine.
• Wear protective hair covering to contain long hair.
• Wear safety shoes with non-slip soles.
• Wear safety glasses complying with United States ANSI Z87.1.
Everyday glasses have only impact resistant lenses. They are
NOT safety glasses.
• Wear face mask or dust mask if operation is dusty.
• Be alert and think clearly. Never operate power tools when
tired, intoxicated or when taking medications that cause
drowsiness.
PREPARE WORK AREA FOR JOB
• Keep work area clean. Cluttered work areas and work benches
invite accidents.
• Do not use power tools in dangerous environments. Do not use
power tools in damp or wet locations. Do not expose power
tools to rain.
• Work area should be properly lighted.
• Proper electrical plug should be plugged directly into properly
grounded, three-prong receptacle.
• Extension cords should have a grounding prong and the three
wires of the extension cord should be of the correct gauge.
• Keep visitors at a safe distance from work area.
• Keep children out of the workplace. Make workshop childproof.
Use padlocks, master switches or remove switch keys to prevent any unintentional use of power tools.
TOOL SHOULD BE MAINTAINED
• Always unplug tool prior to inspection.
• Consult manual for specific maintaining and adjusting proce-
dures.
• Keep tool clean for safest operation.
• Remove adjusting tools. Form habit of checking to see that
adjusting tools are removed before turning machine on.
2
SAFETY RULES (CONTINUED)
• Keep all parts in working order. Check to determine that the
guard or other parts will operate properly and perform their
intended function.
• Check for damaged parts. Check for alignment of moving parts,
binding of moving parts, breakage of parts, mounting and any
other condition that may affect a tool’s operation.
• A guard or other part that is damaged should be properly
repaired or replaced. Do not perform makeshift repairs. (Use
the parts list to order replacement parts.)
PR736, PR738 and PR7310
TOOL REST ASSEMBLY
• Place tool rest (D) over tool rest bracket and secure in position
5
with
/16-18 x 1” knob (F).
I
H
J
G
K
KNOW HOW TO USE TOOL
• Use right tool for job. Do not force tool or attachment to do a
job for which it was not designed.
• Disconnect tool from power when changing accessories such
as grinding wheels, buffing wheels and the like.
• Avoid accidental start-up. Make sure that the switch is in the off
position before plugging in.
• Do not force tool. It will work most efficiently at the rate for
which it was designed.
• Keep hands away from moving parts and grinding surfaces.
• Never leave a tool running unattended. Turn the power off and
do not leave tool until it comes to a complete stop.
• Do not overreach. Keep proper footing and balance.
• Never stand on tool. Serious injury could occur if tool is tipped
over.
• Know your tool. Learn the tool’s operation, application and specific limitations.
• Use recommended accessories. Understand and obey all safety
instructions supplied with accessories. The use of improper
accessories may cause risk of injury to persons.
• Do not over tighten wheel nut. Replace cracked wheel immediately. Use only flanges supplied with the grinder.
• Adjust distance between wheel and tool rest to maintain
1
/16” or
less gap.
• Handle the workpiece correctly. Whenever possible, use tool
rest to support workpiece during grinding operation. Turn tool
off if it jams.
• Always use guards and eyeshields.
• Clean grinding dust from beneath tool frequently.
ASSEMBLY
Parts to be fastened to the unit should be located and accounted
for (See List and Figure 1).
IMPORTANT: Do not attempt assembly if parts are missing. Use
this manual to order replacement parts.
3
A
/8-16 x 3/4” Hex head bolt, 2 each
3
B
/8” Flat washer, 4 each
C Tool rest bracket (left & right), 2 each
D Tool rest (left & right), 2 each
5
E
/16” Flat washer, 2 each
5
F
/16-18 x 1” Knob, 2 each
G #10-24 x
H Upper eyeshield bracket (left & right), 2 each
I Eyeshield, 2 each
J Lower eyeshield bracket, 2 each
1
K
⁄4-20 x 1⁄2” Knob, 2 each
L Spark guard (left & right), 2 each
3
M
/8-16 x 1⁄2” Knob, 2 each
Dust collector hose not shown.
3
⁄8” Pan head screw, 4 each
L
B
M
C
D
B
A
E
F
Figure 1 – Left Tool Rest and Eyeshield Assembly
• Attach tool rest bracket to the bottom of the left wheel guard
3
using one
⁄8-16 x 3⁄4” heax head bolt (A) and one 3⁄8” flat washer (B). Make sure that the slot of the braket is located over the
raised boss on the guard. Tight bolts finger tight.
• Position tool rest so that distance between tool rest and grinding wheel is less than
1
/16”. Reposition angle of tool rest if neces-
sary. Secure all knobs and bolts.
• Mount right tool rest in a similar manner.
EYESHIELD ASSEMBLY
3
• Attach spark guard (L) to left wheel guard using
knob (M) and
3
/8” flat washer (B).
⁄8-16 x 1⁄2”
• Mount left upper eyeshield bracket (H) to eyeshield (I) using
two #10-24 x
3
⁄8” pan head screws (G) ad lower eyeshield
bracket.
NOTE: Left upper eyeshield bracket is stamped “L” for identification.
• Slide
1
/4-20 x 1/2” knob (K) through hole at top of left spark guard
(L) into upper upper eyeshield bracket (H) and secure in
position.
• Locate eyeshield in desired position for protecting operator
and secure all knobs and bolts.
• Mount right eyeshield assembly in a similar manner.
DUST COLLECTOR HOSE
• A dust collector hose has been provided with grinder. Slide
hoses onto sides of T-connector and flanges. Mount the hose
by sliding the flanges at each end over the exhaust ports on
the left and right wheel guards. Attach 2½” shop vacuum hose
to collector hose. Be sure hose is mounted securely.
DANGER: Be sure to empty shop vacuum of all flammable materi-
al (flammable liquids and vapors, paper, wood, plastic, etc.) before
connecting vacuum to grinder. Hot sparks from grinder may ignite
flammable materials in shop vacuum.
3
INSTALLATION
MOUNT GRINDER
• Mount grinder to a solid horizontal surface (hardware not provided). If mounted to metal pedestal, align mounting holes
with corresponding holes in pedestal. Insert a
head bolt with flat washer through base of grinder. From bottom of pedestal, place a
the bolt. Tighten only until space between grinder base and
pedestal is
1
/8” (base should be flush for PR7310). Using second
1
/4” flat washer and 1/4”-20 hex nut onto
nut on each bolt, jam tighten against the first to prevent loosening by vibration.
• To mount grinder to wooden bench top, use
screws with flat washers beneath heads. Tighten screws until
space between grinder base and bench top is
be flush for PR7310).
GROUNDING INSTRUCTIONS
WARNING: Improper connection of equipment grounding con-
ductor can result in the risk of electrical shock. Equipment should
be grounded while in use to protect operator from electrical shock.
• Check with a qualified electrician if grounding instructions are
not understood or if in doubt as to whether the tool is properly
grounded.
• This grinder is equipped with an approved 3-conductor cord
rated at 300V and a 3-prong, grounding type plug (See Figure
2) for your protection against shock hazards.
• Grounding plug should be plugged directly into a properly
installed and grounded 3- prong grounding-type receptacle
(See Figure 2).
Properly Grounded Outlet
Grounding Prong
3-Prong Plug
1
/4-20 x 1¼” hex
1
/4 x 1¼” wood
1
/8” (base should
PR736, PR738 and PR7310
• A temporary 3-prong to 2-prong grounding adapter (See
Figure 3) is available for connecting plugs to a two pole outlet
if it is properly grounded.
Grounding Lug
Adapter
3-Prong Plug
Figure 3 – 2-Prong Receptacle
Make sure this is
Connected to a known
Grounded Receptacle
2-Prong Receptacle
• Do not use a 3-prong to 2-prong grounding adapter unless
permitted by local and national codes and ordinances.
(A 3-prong to 2-prong grounding adapter is not permitted in
Canada.) Where permitted, the rigid green tab or terminal on
the side of the adapter must be securely connected to a permanent electrical ground such as a properly grounded water
pipe, a properly grounded outlet box or a properly grounded
wire system.
• Many cover plate screws, water pipes and outlet boxes are not
properly grounded. To ensure proper ground, grounding means
must be tested by a qualified electrician.
EXTENSION CORDS
• The use of any extension cord will cause some drop in voltage
and loss of power.
• Wires of the extension cord must be of sufficient size to carry
the current and maintain adequate voltage.
• Running the unit on voltages which are not within ±10% of the
specified voltage may cause overheating and motor burn-out.
• Use the table to determine the minimum wire size (A.W.G.)
extension cord.
• Use only 3-wire extension cords having 3-prong grounding
type plugs and 3-pole receptacles which accept the tool plug.
• If the extension cord is worn, cut or damaged in any way,
replace it immediately.
Figure 2 – 3-Prong Receptacle
• Do not remove or alter grounding prong in any manner. In the
event of a malfunction or breakdown, grounding provides a
path of least resistance for electrical shock.
WARNING: Do not permit fingers to touch the terminals of plug
when installing or removing from outlet.
• Plug must be plugged into matching outlet that is properly
installed and grounded in accordance with all local codes and
ordinances. Do not modify plug provided. If it will not fit in outlet, have proper outlet installed by a qualified electrician.
• Inspect tool cords periodically, and, if damaged, have repaired
by an authorized service facility.
• Green (or green and yellow) conductor in cord is the grounding
wire. If repair or replacement of the electric cord or plug is necessary, do not connect the green (or green and yellow) wire to
a live terminal.
• Where a 2-prong wall receptacle is encountered, it must be
replaced with a properly grounded 3-prong receptacle installed
in accordance with National Electric Code and local codes and
ordinances.
WARNING: This work should be performed by a qualified
electrician.
EXTENSION CORD LENGTH (120 VOLTS)
Model PR736
Wire Size A.W.G.
Up to 25 ft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
25 - 100 ft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
100 - 150 ft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
NOTE: Using extension cords over 150 ft. long is not recommended.
EXTENSION CORD LENGTH (120 VOLTS)
Model PR738 and PR7310
Wire Size A.W.G.
Up to 25 ft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
25 - 50 ft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
50 - 100 ft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
100 - 150 ft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
NOTE: Using extension cords over 150 ft. long is not recommended.
EXTENSION CORD LENGTH (240 VOLTS)
Model PR736, PR738 and PR7310
Wire Size A.W.G.
Up to 50 ft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
50 - 200 ft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
200 - 300 ft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
100 - 150 ft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
NOTE: Using extension cords over 300 ft. long is not recommended.
4
INSTALLATION (CONTINUED)
ELECTRICAL CONNECTIONS
WARNING: All electrical connections must be performed by a
qualified electrician. Make sure tool is off and disconnected from
power source while motor is mounted, connected, reconnected or
anytime wiring is inspected.
• Motor and wires are installed as shown in wiring diagram (See
Figure 4, page 5). Motor is assembled with approved, 3-conductor cord to be used at 120/240 volts. Motor is prewired at the
factory for 120 volts.
• To use the grinder with a 240V power supply, have a qualified
electrician rewire motor and attach a 240 volt, I5A three-prong
plug onto grinder line cord.
3-Red 2-Gray
1-Black
120V
3-Red
4-Yellow
2-Gray
PR736, PR738 and PR7310
MAINTENANCE
• As wheels wear, tool rests should be positioned closer to the
face of the wheels.
• The gap between the wheel and the tool rest should not be
greater than
1
the
/16” maximum gap cannot be maintained, the wheels
should be replaced.
• Models PR736 and PR738: Replacement wheels should have a
minimum rated speed of at least 3600 RPM.
• Model PR7310: Replacement wheels must have a minimum
rated speed of 1800 RPM.
• Maximum wheel diameter is 6” for PR736, 8” for PR738, and 10”
for PR7310.
• To loosen nuts holding the wheels, disconnect power and push
a wood wedge between the tool rest and the wheel to keep
the shaft from turning. The threads on the right side of the
grinder (facing unit) are right hand; threads on the left side are
left hand. Tighten nuts securely before operating the grinder.
• For grinding efficiency, wheels should be dressed periodically,
especially if they become clogged from grinding soft metals.
1
/16”. When the wheels are worn to the extent that
WARRANTY
1-Black
240V
Figure 4 – Wiring Diagram
4-Yellow
OPERATION
WARNING: Always wear safety glasses complying with United
States ANSI Z87.1 (shown on package) before commencing power
tool operation.
• Keep a steady, moderate pressure on the work and keep it
moving at an even pace for smooth grinding.
• Pressing too hard overheats the motor and prematurely wears
down the grinding wheels.
• Note the original bevel angle on the item to be sharpened and
try to maintain that angle. Sharpening a cutting edge requires
removing burrs from edge.
• Deburring edge is done best by using the grinder to pull burr
from edge across the bevel angle.
• The grinding wheel should rotate into object being sharpened.
• Dip work into a coolant regularly to prevent overheating.
Overheating can weaken metals.
PRM warrants their products to be free of defects in material or
workmanship. This warranty does not cover defects due
directly or indirectly to misuse, abuse, normal wear and tear, failure
to properly maintain the product, heated, ground or otherwise
altered, or used for a purpose other than that for which it was
intended. The warranty does not cover expendable and/or wear
parts (i.e. v-belts, coated screws, abrasives), damage to tools arising
from alteration, abuse or use other than their intended purpose,
packing and freight. The duration of this warranty is expressly limited to one year parts and labor, unless otherwise noted below
beginning from the date of delivery to the original user.
The obligation of PRM is limited solely to the repair or replacement, at our option, at its factory or authorized repair agent of any
part that should prove deficient. Purchaser must lubricate and
maintain the product under normal operating conditions at all
times. Prior to operation become familiar with product and the
included materials, i.e. warnings, cautions and manuals. Failure to
follow these instructions will void the warranty.
This warranty is the purchaser’s exclusive remedy against PRM for
any deficiency in its products. Under no circumstances is PRM liable
for any direct, indirect, incidental, special or consequential damages
including lost profits in any way related to the use or inability to
use our products. This warranty gives you specific legal rights
which may vary from state to state.
5
PR736
20
1
3
43
15
10
16
30
14
39
32
31
35
34
42
33
37
36
38
19
20
24
5
9
22
8
6
2
11
24
21
25
26
11
24
39
29
28
27
11
26
25
42
23
17
18
20
21
2
10
11
22
6
7
5
4
33
40
14
13
12
9
33
41
3
1
Figure 7 - Replacement Parts Illustration for 6” Bench Grinder
6
PR736
BENCH GRINDER
”
⁄2” Knob 25816.00 2
1
⁄4-20 x
1
⁄4” Lock washer * 2
⁄4”-20 Hex nut * 2
⁄16-18 x 1” Knob 25812.00 2
1
1
5
⁄2”-12 Hex nut (RH thread) 00548.00 1
1
No. Description Number Qty.
23 5mm-0.8 Hex nut * 2
24
25 Endshield 16617.02 2
26 Bearing 6202ZZ 01540.00 2
27 Motor fan 01608.00 1
28 Armature † 1
29 Stator with housing † 1
30 Grommet 01066.00 1
31 Line cord 00067.00 1
32 Strain relief 04055.00 1
33 #10-24 x 1/4” Flange screw 3210.00 6
34 Base 23757.02 1
35 Rocker switch with key 08066.01 1
36 Cover 23758.00 1
37
38
39
40 Capacitor 16908.00 1
41 Bumper 23991.00 4
42 #10 Serrated washer * 3
Ref. Part
43
REPLACEMENT PARTS LIST FOR 6
⁄2” Pan head screw * 6
1
⁄2”-12 Hex nut (LH thread) 00064.00 1
1
5 Flange 18904.00 2
1 #10-24 x
2 Spark guard (set of 2) 30014.00 1
Ref. Part
No. Description Number Qty.
3 Wheel guard cover 24462.02 2
6 Inner wheel flange 17315.00 2
4
⁄8” Flange screw 16670.00 6
⁄4” Hex head bolt * 2
3
3
⁄4-20 x
⁄8-16 x
⁄8” Flat washer * 4
1
3
3
7 Grinding wheel (36 coarse grit) 02034.00 1
8 Grinding wheel (60 med. grit) 02033.00 1
9
10
11
⁄16” Flat washer * 2
5
12 Bracket (left) 25810.00 1
13 Tool rest (left) 25813.00 1
14
⁄8” Pan head screw * 4
3
15 Bracket (right) 25826.00 1
18 Upper eyeshield bracket (left) 25177.00 1
16 Tool rest (right) 25825.00 1
17 #10-24 x
⁄2” Knob 25817.00 2
1
⁄8-16 x
3
∆ Not Shown.
* Standard hardware item available locally.
19 Upper eyeshield bracket (right) 25188.00 1
20 Eyeshield kit 32290.00 1
21
22 Wheel guard 25986.00 2
† Not available as a repair part.
7
PR738
23
1
22
23
14
4
6
5
9
7
12
2
19
26
45
15
27
41
48
47
29
30
12
25
11
31
13
32
10
33
38
39
43
18
46
37
44
19
14
23
24
37
49
30
29
12
47
28
23
42
34
36
35
11
12
3
2
23
21
41
45
37
17
41
27
7
8
5
4
40
10
13
16
20
1
Figure 7 - Replacement Parts Illustration for 8” Bench Grinder
8
PR738
BENCH GRINDER
”
⁄4” Flange screw – 7
⁄4” Flange screw 03210.00 9
1
⁄2” Hex head bolt * 6
1
⁄4-20 x
1
1
⁄4” Lock washer * 8
⁄4”-20 Hex nut * 2
1
1
Ref. Part
No. Description No. Qty.
28 5-0.8 x 228mm Flange screw 16654.00 4
29 Endshield 16627.02 2
30 Bearing 6204ZZ 00989.00 2
31 Motor fan 22041.00 1
32 Armature † 1
33 Stator with housing † 1
34 Grommet 01066.00 1
35 Line cord 00090.00 1
36 Strain relief 04055.00 1
37 #10-24 x
38 Base 24499.02 1
39 Switch with key 08066.01 1
40 Base cover 24500.00 1
26 5-0.8 mm Hex nut * 4
27
37 #10-24 x
41
42
43 Capacitor clamp 16655.00 1
44 Capacitor 16646.00 1
45 #10 Serrated washer * 5
46 Base bumper 23991.00 4
47 Wavy washer 16640.00 2
∆ Operators manual 36626.00 1
48 Bracket (right) 31448.00 1
49 Centrifugal switch 25172.00 1
REPLACEMENT PARTS LIST FOR 8
⁄8” Pan head screw – 10
⁄2” Pan head screw * 10
7
1
⁄8”-11 Hex nut (LH thread) 00088.00 1
5
7 Inner wheel flange 24498.00 2
1 #10-24 x
1 #10-24 x
2 Wheel guard 26056.00 2
3 Spark guard (set of 2) 25815.00 1
4 Wheel guard cover 24496.02 2
Ref. Part
No. Description No. Qty.
5 Flange 24497.00 2
8 Grinding wheel (36 coarse grit) 02038.00 1
6
⁄4” Hex head bolt * 2
3
⁄16-18 x 1” Knob 25812.00 2
⁄8-16 x
5
3
3
9 Grinding wheel (60 med. grit) 02037.00 1
11
10
⁄8” Flat washer * 4
12
⁄8” Knob 25816.00 2
3
⁄16” Flat washer * 2
⁄4-20 x
5
1
13
15 Dust collector hose 08070.00 1
14
⁄8” Flange screw 03207.00 1
3
⁄2” Knob 25817.00 2
1
⁄8-16 x
⁄8”-11 Hex nut (RH thread) 00087.00 1
3
5
∆ Not Shown.
21 Upper eyeshield bracket (left) 25177.00 1
22 Upper eyeshield bracket (right) 25788.00 1
23 Eyeshield kit 32290.00 1
24 Stationary switch 25171.00 1
16 Tool rest (left) 25813.00 1
17 Bracket (left) 31447.00 1
18 #10-24 x
20
19
25 Tool rest (right) 25825.00 1
* Standard hardware item available locally.
† Not available as a repair part.
9
PR7310
1
23
4
22
23
5
9
25
7
51
27
41
26
3
12
20
24
29
19
24
20
28
12
11
30
49
2
32
15
12
33
48
35
34
18
36
17
14
47
42
43
10
46
46
46
45
44
2
14
50
17
16
46
39
2
37
31
30
40
41
38
11
12
29
28
3
41
23
21
23
26
7
8
5
6
4
27
1
13
Figure 8 - Replacement Parts Illustration for 10” Bench Grinder
10
PR7310
BENCH GRINDER
”
⁄4” Flange screw 03210.00 10
⁄8” Hex head bolt * 6
5
⁄16-18 x
⁄4-20 x 2” Flange screw 03209.00 8
5
1
⁄16” Lock washer * 10
⁄16”-18 Hex nut * 4
5
5
1
No. Description Number Qty.
28
27
29 Endshield 16913.02 2
30 Bearing 6206ZZ 00297.00 2
31 Motor fan 01639.00 1
32 Armature † 1
33 Stator with housing † 1
34 Grommet 16916.00 2
35 Line cord 00090.00 1
36 Strain relief 01601.00 1
37 Strain relief plate 08172.00 1
38 Base 16917.02 1
Ref. Part
39 Switch with key 08066.01 1
42
43 Capacitor clamp 16918.00 1
40 Switch plate 08173.00 1
41
44 Capacitor 08174.00 1
47 #10 Serrated washer * 1
48 Stationary switch 08175.00 1
49 Rotating switch 00299.00 1
50 Base cover 16919.00 1
45 Capacitor cap 01638.00 2
46 #10-24 x
51 Bracket (right) 26291.00 1
REPLACEMENT PARTS LIST FOR 10
⁄8” Flange screw 03207.00 3
3
⁄4” Pan head screw * 10
3
⁄4-20 x
1
3 Spark guard (Set of 2) 25815.00 1
1
2 #10-24 x
4 Wheel guard cover 16911.02 2
5 Flange 24480.00 2
6 1”-8 Hex nut (LH thread) 00111.00 1
7 Inner wheel flange 24481.00 2
Ref. Part
No. Description Number Qty.
8 Grinding wheel (36 coarse grit) 02040.00 1
⁄4” Hex head bolt * 2
3
⁄8-16 x
⁄8” Flat washer * 4
12
⁄16-18 x 1” Knob 25812.00 2
5
13 Bracket (left) 26290.00 1
14
3
3
9 Grinding wheel (60 med. grit) 02039.00 1
10 Capacitor 16895.00 1
11
⁄16” Flat washer * 2
5
15 Dust collector hose 08070.02 1
16 Tool rest (left) 25813.00 1
17
⁄8” Knob 25816.00 2
3
⁄4-20 x
1
18 Tool rest (right) 25825.00 1
19 Wavy washer 16620.00 1
20
21 Upper eyeshield bracket (left) 25177.00 1
⁄2” Knob 25817.00 2
1
⁄8-16 x
3
∆ Not Shown.
22 Upper eyeshield bracket (right) 25188.00 1
23 Eyeshield kit 32290.00 1
24
25 1”-8 Hex nut (RH thread) 00110.00 1
26 Wheel guard 26057.00 2
* Standard hardware item available locally.
† Not available as a repair part.
11
TROUBLESHOOTING
PR736, PR738 and PR7310
SYMPTOM
Grinder won’t start
Excessive vibration
Motor overheating
Fuses are being blown or
circuit breakers are being tripped
Motor does not develop proper torque
POSSIBLE CAUSE(S)
1. Blown line fuse or tripped circuit breaker
2. Low line voltage
3. Material wedged between wheel
and guard
4. Defective switch
5. Defective, blown capacitor
1. Improper mounting of grinder or
accessories
2. Grinding wheel out of balance
3. Improper wheel mounting
1. Excess pressure required to grind material
2. Grinding on side of wheel
3. Motor not turning freely (without power)
1. Overloading due to binding
2. Defective plug
3. Defective cord
4. Defective switch
5. Motor wired for different line voltage
6. Faulty internal wiring
1. Motor wired for different line voltage
CORRECTIVE ACTION
1. If fuse is blown, replace with fuse of
proper size. If breaker tripped, reset it
2. Check power supply for voltage and
correct as needed
3. Turn grinder off and remove material
4. Replace switch
5. Replace capacitor
1. Remount
2. Dress wheels or replace wheels
3. Remount wheels, but rotate one wheel
90º with respect to its previous position.
Other wheel should remain in its original
position
1. Dress wheel or replace wheel with one of
proper grit
2. Grind only on face of wheel
3. Clean around wheels and shaft and/or
replace bearings
1. Clean around wheels and shaft and/or
replace bearings
2. Replace plug
3. Replace cord
4. Replace switch
5. Rewire motor as per wiring diagram,
(See Installation, Page 5)
6. Contact your PRM distributor
1. Rewire motor as per wiring diagram,
(See Installation, Page 5)
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