Jacobsen LF 3400 Manuel De Maintenance page 11

3.5 FLASH ATTACH ___________________________________________________________
Installing Cutting units
1. Place each cutting unit in front of its respective lift arm.
Raise lift arm and position cutting unit so that yoke (T) is
in line with swivel housing (S). Carefully lower arm onto
yoke. Insert pin (K) through hole in yoke, fasten retain-
ing clip (L) and install cap (M).
2. Assemble motors (N), with hoses attached, to the
cutting units. Clean motor splines and coupling. Apply
Moly 2 EP grease to the female spline on reel.
Thoroughly clean the motor mounting surface. Slide
motor into bearing housing. On 5" reels lock motor in
place by insterting two motor clips (O), with loops
facing center of motor, into mounting pins (P). On 7"
reels hand tighten key (Q) on bearing housing.
3. Raise reels and install down pressure spring pins (V,
Figure 3F). If cutting height has not changed, set pins
in same position they were in when reels were
removed.
Removing Cutting Units
1. Lower reels to the ground and remove down pressure
spring pins (V, Figure 3F). Make note of where springs
are set .
2. On 5" reels, remove motor clips (O). On 7" reels loosen
key (Q) on motor housing. Pull motor straight out from
cutting unit.
3. Carefully place motor and its hoses away from the
cutting unit. To prevent contamination and damage to
internal components cover or cap off bearing housing
cavity (R).
4. Remove cap (M) on lift arm. Unfasten retaining clip (L)
from pin (K) and remove pin.
3.6 DOWN PRESSURE _________________________________________________________
Each reel is equipped with a down pressure spring. Down
pressure improves cutting quality by ensuring consistant
contact between the reel and ground. Check and adjust
down pressure any time cutting height has been changed or
to optimize the cut for best performance.
1. With reels raised, place pin
Lower reels onto a flat surface before measuring down
pressure.
2. Initially set distance between ball joint center and rod
cross pin center to 8-15/16" ± 1/16" (227 mm ± 2 mm).
To adjust length, loosen lock nut
in or out of balljoint.
3. Measure length of spring as shown on all 5 reels.
Record the shortest spring dimension and set the other
springs by adjusting rods
All manuals and user guides at all-guides.com
(V) it 4th hole from balljoint.
(W) and turn rod (U)
(U) to that dimension ± 1/16"
ADJUSTMENTS
5. Carefully raise arm until cutting unit can be removed.
M
L
K
S
7" REELS
T
R
5" REELS
P
(2 mm). The rod cross pin must be horizontal, then
W) .
tighten locknut (
4. To adjust down pressure, move pin one hole towards
spring to increase pressure, or one hole away from
spring to decrease pressure on rear roller.
8-15/16"
U
3
Q
N
N
O
LF010
Figure 3E
V
W
Figure 3F
GB-11