OWNER’S MANUAL
© 2011 Miller Electric Mfg. Co.
FORM: OM-242 391B 2011−02
All Terrain EZ Running Gear For Gas Models (300 572 And 300 573)
All Terrain EZ Running Gear With Never Flatt Tires For Gas Models (300 574 And 300 575)
DANGER! − Indicates a hazardous situation which, if not
avoided, will result in death or serious injury. The possible
hazards are shown in the adjoining symbols or explained
in the text.
Beware of electric shock from wiring. Stop engine and
disconnect negative (−) cable from battery before install-
ing this kit. Reinstall all panels and covers.
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury. The possible ha-
zards are shown in the adjoining symbols or explained in
the text.
Falling equipment can injure, and damage equipment.
Never put any body part under unit while lifting. Lifting
forks must extend out opposite side of base. Lift and sup-
port unit only with proper equipment and correct proced-
ures. Follow the guidelines in the Applications Manual for
the Revised NIOSH Lifting Equation (Publication No.
94−110) when manually lifting heavy parts or equipment.
NOTICE
Indicates statements not related to personal injury.
Indicates special instructions.
Wear safety glasses with side shields.
OM-242 391 Page 2
1. Assembling Of All Terrain Running Gear (300 572, 300 574)
Tools Needed:
7/16, 9/16 in
3/8, 9/16 in
1
2
3
4
5
12
13
14
4
15
16
16
7
6
10
11
8
242 446-A
Use Hole 3
For Mounting
⇓
15
16
9
OM−242 391 Page 3
Description (Qty)
Part
No.
Item
No.
1 220263 Assy, Handle Running Gear (1)
2 108940 Screw, 250−20x .75 Hexwhd.61d Gr5 Pld (2)
3 220375 Bracket, Crossmember (1)
4 604224 Screw, 250−20 x .75 Hexwhd .50d Stl Pld Slffmg Tap−rw (6)
5 601965 Screw, 375−16 x 1.00 Hex Hd−pln Gr5 Pld (4)
6 167788 Nut, 375−16 .56hex .34h Stl Pld Sem Cone Wshr .88d (4)
7 240862 Rail, Base Support Rh (1)
8 240860 Axle, Wheel (Small) (1)
9 203854 Wheel, Rbr Tire 10.250 Od X 3.250 Wide X 1.000 Bore (2)
9 240931 Wheel, Rbr Never Flat 10.250 Od X 3.250 Wide X 1.000 Bore (2)
10 235794 Wheel, Rbr Tire 14.500 Od X 4.750 Wide X 1.000 Bore (2)
10 237725 Wheel, Rbr Never Flat 14.500 Od X 4.750 Wide X 1.00 Bore (2)
11 240861 Axle, Wheel (Large) (1)
12 235789 Rail, Base Support Lh (1)
13 152461 Nut, 250−20 .44hex .23h Stl Pld Sem Cone Wshr .65d (2)
14 197930 Label, Warning Do Not Weld On Base (2)
15 145665 Ring, Rtng Ext 1.000 Shaft X .052 Thk E Style Pld (4)
16 602251 Washer, Flat1.062idx2.000odx.134t Stl Pld Ansi 1.00 (4)
Be sure to provide model when ordering replacement parts.
. Remove paint from axle grooves be-
fore installing retaining rings.
Assembly:
Assemble base rails, axles, and wheels
(valve stems out).
. Install onto generator using rail
mounting hole 3. Adjust to achieve
proper balance for application and ac-
cessories.
Mount handles. Do not tighten hardware.
Install crossmember and tighten all hard-
ware.
OM-242 391 Page 4
1
2
3
4
5
15
16
19
16
18
12
13
14
10
11
9
6
7
8
20
21
21
17
2. Assembly Of All Terrain Running Gear With Protective Cage (300 573, 300 575)
Tools Needed:
7/16, 9/16 in
3/8, 9/16 in
242 448-A
⇓
Remove and
discard exist-
ing hardware
before instal-
ling handle.
18
17
OM−242 391 Page 5
Description (Qty)
Part
No.
Item
No.
1 220260 Rail, Side (2)
2 108940 Screw, 250−20 x .75 Hexwhd .61d Gr5 Pld (8)
3 220266 Assy, Cable Holder (4)
4 220263 Assy, Handle Running Gear (2)
5 601965 Screw, 375−16 x 1.00 Hex Hd−Pln Gr5 Pld (4)
6 240862 Rail, Base Support Rh (1)
7 167788 Nut, 375−16 .56hex .34h Stl Pld Sem Cone Wshr .88d (4)
8 240860 Axle, Wheel (Small) (1)
9 203854 Wheel, Rbr Tire 10.250 Od X 3.250 Wide X 1.000 Bore (2)
9 240931 Wheel, Rbr Never Flat 10.250 Od X 3.250 Wide X .1.000 Bore (2)
10 235794 Wheel, Rbr Tire 14.500 Od X 4.750 Wide X 1.000 Bore (2)
10 237725 Wheel, Rbr Never Flat 14.500 Od X 4.750 Wide X 1.00 Bore (2)
11 235792 Axle, Wheel (Large) (1)
12 240861 Rail, Base Support Lh (1)
13 604224 Screw, 250−20 x .75 Hexwhd .50d Stl Pld Slffmg Tap−Rw (12)
14 111998 Pin, Cotter Hair .120 Dia X 2.375lg X .500 Shaft (4)
15 152461 Nut, 250−20 .44hex .23h Stl Pld Sem Cone Wshr .65d (8)
16 197930 Label, Warning Do Not Weld On Base (2)
17 145665 Ring, Rtng Ext 1.000 Shaft X .052 Thk E Style Pld (4)
18 602251 Washer, Flat1.062idx2.000odx.134t Stl Pld Ansi 1.00 (4)
19 239122 Bracket, Rail Support Lh (1)
20 239123 Bracket, Rail Support Rh (1)
21 228644 Label, Warning Do Not Lift (Bilingual) (2)
Be sure to provide model when ordering replacement parts.
. Remove paint from axle grooves be-
fore installing retaining rings.
Assembly:
Assemble base rails, axles, and wheels
(valve stems out).
. Install onto welding generator. Use
mounting hole 3 in rails. Adjust to
achieve proper balance for applica-
tion and accessories.
Mount handles. Do not tighten hardware.
Install side rail brackets and side rails, and
tighten all hardware.
Install cable holders.
/