Kärcher TRK-3500 Operator'S Manual Download Page 5

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9.800-199.0 • Kärcher Trailer Manual • Rev. 01/08

TRAILER

OPERA

TOR’S MANU

Wheel lugs

Wheel lug nuts must be tightened with a torque wrench.
Refer to the chart below for proper torque.
1. Start all bolts or nuts by hand to

prevent cross threading.

2. Tighten bolts or nuts following

sequence at right.

. The tightening of the fasten-

ers should be done in stages.
Following the recommended
sequence, tighten fasteners per wheel torque chart
below.

4. Wheel nuts/bolts should be torqued before first road

use and after each wheel removal. Check and re-
torque after the first 10 miles, 25 miles and again at
50 miles. Check periodically thereafter.

Wheel Torque requirements

Ball Coupler hitches

Coupler assembly includes a latch lever and latch lever
safety pin or hitch pin. Be sure the latch lever is locked
and the pin properly secured before moving your trailer.
The pin can be engaged fully only if ball is properly
seated in the coupler.

hitch Balls

These come in a variety of diameters and capacities.
The GVWR (General Vehicle Weight Rating) capacity
is always stamped on the ball. Use a 2" ball.

always

sure the hitch ball at least matches the GVWR of your
trailer.

always

be sure the diameter of the hitch ball

matches the coupler diameter.

Never

attempt to tow

your trailer with improper size ball.

always

keep ball

greased to avoid excessive wear. Replace worn hitch
ball or locking dogs promptly.

Tires

Before mounting tires onto wheels make certain that
the rim size and contour is approved for the tire as
shown in the Tire and Rim Association Yearbook or the
tire manufacturer’s catalog. Also make sure the tire will
carry the rated load. If the load is not equal on all tires
due to trailer weight distribution, use the tire rated for the
heaviest wheel position.

Note:

The capacity rating molded into the sidewall

of the tire is not always the proper rating for the
tire if used in a trailer application. Use the following
guideline:
1. LT and ST tires: use the capacity rating molded

into the tire.

2. Passenger Car Tires: Use the capacity rating

molded into the tire sidewall divided by 1.10.

Use tire mounting procedures as outlined by the
Rubber Manufacturer’s Association or the tire manu-
facturers.
Tire inflation pressure is the most important factor in
tire life. Inflation pressure should be as recommended
by the manufacturer for the load. Pressure should
be checked cold before operation. Do not bleed air
from tires when they are hot. Check inflation pres-
sure weekly during use to insure the maximum tire
life and tread wear. The following tire wear diagnostic
chart will help you pinpoint the causes and solutions
of tire wear problems.

Note:

Tire wear should be checked frequently

because once a wear pattern becomes firmly es-
tablished in a tire it is difficult to stop, even if the
underlying cause is corrected.

Wheel

Size

TOrqUe SeqUeNCe

1st Stage

2nd Stage

3rd Stage

14"

20 - 25

50 - 60