Towing The Trailer; Trailer Wheel Bearings - Generac Mobile MGG450 Owner's Manual

Operation
Table 3-7. Prime Derate Temperature and
Fuel Quality (50 Hz units)
Ambient Temperature
Methane 77°F 86°F
Number (25°C) (30°C)
35 240 223
40 240 238
45 255 253
50 270 268
55 285 283
60 288 283
65 288 283
70 288 283
75 288 283
80 288 283
85 288 283
90 288 283

Towing the Trailer

Use the jack to raise or lower the trailer onto the
1.
hitch of the towing vehicle. Lock the hitch coupling
and attach the safety chains or cables to the
vehicle. Raise the jack foot completely.
Connect any trailer wiring to the tow vehicle. Check
2.
for proper operation of the directional and brake
lights.
Make sure all doors are properly latched.
3.
Check for proper inflation of the trailer tires. Refer
4.
to Specifications.
Check the wheel lugs. Tighten or replace any that
5.
are loose or missing. If a tire has been removed or
replaced, tighten lugs in the order shown in
Figure 3-5.
22
95°F 104°F 113°F 122°F
(35°C) (40°C) (45°C) (50°C)
213 202 178 149
228 217 193 164
243 232 208 179
258 247 223 194
273 262 238 209
276 271 253 224
276 271 264 239
276 271 264 254
276 271 264 259
276 271 264 259
276 271 264 259
276 271 264 259
8
3
5
Figure 3-5. Lug Tightening Sequence
Start all lug nuts by hand.
6.
– First pass tighten to 20-25 ft-lbs (27-33 Nm)
– Second pass tighten to 50-60 ft-lbs (67-81 Nm)
– Third pass tighten to 90-120 ft-lbs (122-162 Nm)
NOTE: After the first road use, re-tighten the lug nuts in
sequence.
Maximum recommended speed for highway towing is 45
mph (72 km/h). Recommended off-road towing speed is
not to exceed 10 mph (16 km/h) or less, depending on
terrain.

Trailer Wheel Bearings

Some trailers are equipped with a grease zerk fitting to
allow lubrication of the wheel bearings without the need
to disassemble the axle hub. To lubricate the axle
bearings, remove the small rubber plug on the grease
cap, attach a standard grease gun fitting to the grease
zerk fitting and pump grease into the fitting until new
grease is visible around the nozzle of the grease gun.
Use only a high quality grease made specifically for
lubrication of wheel bearings. Wipe any excess grease
from the hub with a clean cloth and replace the rubber
plug when finished. The minimum recommended
lubrication is every 12 months or 12,000 miles (19,312
km). More frequent lubrication may be required under
extremely dusty or damp operating conditions.
1
6
4
7
2
001441
Owner's Manual for MGG450