Multi Pro 5800 Hydraulic SystemPage 5 − 83
6. Put caps or plugs on disconnected hoses and fittings
to prevent contamination.
7. Remove lock nut that secures the barrel end of the
steering cylinder to the front axle.
8. Remove cotter pin and slotted hex nut that secure
the shaft end of the steering cylinder to the left side front
axle spindle.
9. Carefully pry cylinder with ball joints from axle and
front axle spindle with a ball joint “pickle” fork and re-
move steering cylinder from machine.
10.If hydraulic fittings are to be removed from steering
cylinder, mark fitting orientation to allow correct assem-
bly. Remove fittings from cylinder and discard O−rings.
11.If ball joint requires removal from cylinder shaft,
count number of revolutions it takes to remove from
shaft so ball joint can be re−installed without affecting
steering.
Installation (Fig. 59)
1. If ball joint was removed from cylinder shaft, install
ball joint onto shaft the same number of revolutions
needed to remove ball joint. Secure ball joint with jam
nut. After ball joint installation, the distance between ball
joint centers should be from 18.620 to 18.740 in (473.0
to 475.9 mm) with the cylinder shaft fully retracted
(Fig. 61).
2. If fittings were removed from steering cylinder, lubri-
cate and place new O−rings onto fittings. Install fittings
into cylinder port openings using marks made during the
removal process to properly orientate fittings. Tighten
fittings (see Hydraulic Fitting Installation in the General
Information section of this chapter).
3. Thoroughly clean tapered surfaces of cylinder ball
joints and axle bores.
4. Place rod end seal on cylinder shaft ball joint. Insert
rod ends of cylinder down into attachment points on the
axle assembly.
5. Secure shaft end of cylinder to the front axle spindle
with thrust washer and slotted hex nut. Tighten hex nut
from 20 to 25 ft−lb (27 to 34 N−m) and if necessary,
continue tightening the nut until hex nut groove aligns
with cotter pin hole in ball joint. Install cotter pin.
6. Secure barrel end of cylinder to the front axle with
thrust washer and slotted hex nut. Tighten hex nut from
20 to 25 ft−lb (27 to 34 N−m) and if necessary, continue
tightening the nut until hex nut groove aligns with cotter
pin hole in ball joint. Install cotter pin.
1. Hose from steering control R port
2. Hose from steering control L port
3. Steering cylinder
Figure 60
1
3
2
Figure 61
18.620” to 18.740”
(473.0 to 475.9 mm)
7. Remove caps and plugs from disconnected hoses
and fittings.
8. Lubricate new O−rings and connect hydraulic hoses
to steering cylinder (Fig. 60). Tighten hose connections
(see Hydraulic Hose and Tube Installation in the Gener-
al Information section of this chapter).
9. Check fluid level in hydraulic oil reservoir and adjust
as required (see machine Operator’s Manual).
10.After assembly is completed, operate steering cylin-
der to verify that hydraulic hoses and fittings are not con-
tacted by anything and that there are no leaks. Also,
make sure that a clockwise rotation of the steering wheel
makes a right turn.
11.Grease steering cylinder ball joint fittings with high
temperature grease.
12.Check vehicle toe in and adjust if necessary (see ma-
chine Operator’s Manual).
Hydraulic
System
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