Great Plains NTA607HD Operator Manual - Manual (Page 7)

Adjust Linkage Great Plains Manufacturing, Inc. 7
12/02/2010 166-365M
Adjust Linkage
Refer to Figure 8
The factory setting of the lift assist link has approximately
7.62cm (3in) of exposed threads outside the fixed end of
the lift assist link. Adjust the link (extend it out) by only
2.54cm to 3.81cm (1 to 1
1 ⁄
2
in). Anymore than that could
be unsafe and lead to machine damage.
Caster Failure Hazard:
Never exceed 13.97cm (5
1 ⁄
2
in) of exposed threads on the lift
assist adjustment link. Exceeding this measurement could
result in linkage failure leading to severe machine damage,
bodily injury or death.
1. With drill (unfolded and lowered) place a jack stand
underneath the rear part of the frame near the caster
wheels. Support is required to take weight off the
casters for ease of adjustment. If you do not have a
jack stand, an alternative method to reduce weight
on the casters is to do the following four steps:
• turn the 90 degree ball valve on the fan to trans-
port position
• activate the tractor remote lever to supply oil to
the fan/weight transfer circuit
• set the cart weight transfer to 100 psi
• set the wing weight transfer to the maximum
pressure setting of 1500 psi.
2. Measure from the inside face of the square nut to
the inside face of the adjuster nut (see Figure 8).
The factory setting is approximately 7.62cm (3in).
Adjust it out 2.54cm (1in) to start with. The measure-
ment from the face of the square nut to the face of
the adjuster nut will now be 10.16cm (4in).
3. Determine if adjusting the link 2.54cm (1in) provides
a satisfactory result. See “Determine Results” on
page 8. If frame drops back too much it indicates
there is still too much weight. Follow instructions for
removng rear weight set.
Link Adjust
Thread
Measurement
PW Transport
Clearance
Comments Casters
factory set 7.62cm (3in) 27.94cm (11in) factory setting
2.54cm (1in) 10.16cm (4in) 22.86cm (9in)
moves casters 10.16cm (4in)
more than factory setting
3.81cm (1.5in)
11.43cm
(4.5in)
20.32cm (8in)
maximum recommended link
adjustment moves casters 15.24cm (6in)
more than factory setting
5.08cm (2in) 12.7 (5in) 17.78cm (7in)
not recommended
start losing PW clearance moves casters 20.32cm (8in)
more than factory setting
6.35cm (2.5in)
13.97cm
(5.5)in
less than12.7cm
(5in)
NEVER EXCEED UNSAFE thread engagement not enough
for safe transport
Figure 8
Adjust Lift Assist Link
2
1
Null4:
31755
1 2
Null4:
31747
1
2