Still STEDS R70-16 Manuel utilisateur

Contents Page

Frame and counterweight 1

Jacking up the truck 2

Workshop Manual 7052/56/74-76, 7054/58/77-79

Frame and Counterweight

Frame

The welded steel frame is of unit construction and

has a bolt-on cast iron counterweight.

The hydraulic oil tank serves as a frame cross-

member located underneath the floor plate.

Counterweight

The removable rear counterweight is secured to

the frame by three bolts (see sketch).

1 = hex hd bolt M 24 x 85 / 8.8

2 = spherical washer

3 = ball cup

The three counterweight bolts (item 1) should be

torqued to 660 Nm.

Weight of the counterweights :

7052 / 7054 —> 940 kgs

7056 / 7058 —> 1080 kgs

Workshop Manual 7052/56/74-76, 7054/58/77-79

CAUTION:

Before jacking up the truck :

Apply the parking brake !

To carry out certain maintenance tasks the truck must

be jacked up and securely chocked into position.

Always make sure only jacks of suitable capacity

are used.

Before jacking up the truck, position it on level ground

and secure against slipping or rolling.

Jack up the truck by placing a jack at locations shown

in the figures, i.e. beneath the mast right or left and

beneath the frame at the front or at the rear.

Never jack up the truck at rear counterweight !

When jacking up the truck observe safety rules

covering maintenance and service jobs on the mast.

Jacking up the truck

Workshop Manual 7052/56/74-76, 7054/58/77-79

Steer axle

Contents Page

Technical Data for 1

Maintenance Service

Mechanical configuration of Steer axle

Steer axle removal 2

Steer axle installation 2

Wheel hub - Removal and 3

Dismantling

Wheel hub - Reassembling and 3

Installation

Wheel angle stop adjustment 4

Checking the steering angles 4

Stub axle - Removal and 5

Dismantling

Stub axle - Reassembling and 6

Installation

Lubricating the steer axle with 6

grease

Track rod removal 7

Track rod installation 7

Steer cylinder removal 8

Steer cylinder installation 8

Workshop Manual 7052/56/74-76, 7054/58/77-79

Technical Data for Maintenance Service

Workshop Manual 7052/56/74-76, 7054/58/77-79

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Steer axle

Configuration of steer axle

The articulating steer axle suspended from the

counterweight is mounted in 2 neoprene blocks. The

stub axles are supported in the axle beam on tapered

roller bearings. Steering is limited by stop screws on

the stub axles.

1 axle beam

2 fixing plates

3 hex. hd. bolt

4 spring washer

5 neoprene blocks

Steer axle removal

CAUTION: Remove steer axle only with mast in

position on the truck!

Risk of tipping!

- Apply the parking brake.

-Securely chock the front wheels to prevent

rolling of the truck.

- Slacken steer wheel nuts.

- Jack up rear of the truck at counterweight (x)

and place wooden blocks under the counter-

weight in front of the axle.

- Remove wheels.

- Disconnect the hydraulic connections at steer

cylinder.

CAUTION: Prepare for oil spillage when

disconnecting the hydraulic connections!

Catch oil in a pan of adequate capacity

and dispose of the used oil in accordance

with laws and regulations.

- Remove the 4 socket head screws which re-

tain the steer axle in place.

- Slide a hand pallet truck under the steer axle

with wooden blocks placed on the fork ends

of the hand pallet truck.

- Using a lever, drive steer axle out of roll pins

and lower the axle onto the hand pallet truck.

Steer axle installation

- Reverse the removal procedure.

- The slots of the roll pins must face the direc-

tion of forward travel.

-Torque the 4 socket heads to: MA = 195 Nm

CAUTION: Do not swap hydraulic connec-

tions left and right!

Workshop Manual 7052/56/74-76, 7054/58/77-79

Steer axle

Wheel hub - Removal and Dismantling

1 axle beam

2 stub axle

3 radial sealing ring

4 tapered roller bearing

5 wheel hub

6 roll pin

7 hub cap

8 nut

9 washer

10 tapered roller bearing

11 wheel bolt

12 ball seat nut

- Slacken ball seat nuts (12) and remove

wheel.

- Pull hub cap (7) from wheel.

- Slacken nut (8)

- Remove washer (9) with roll pin (6).

- Withdraw the hub.

- Remove radial sealing ring (3) then remove

tapered roller bearings (4) and (10) from hub.

- If necessary, drive out of wheel hub outer

races of tapered roller bearings (4) and (10).

Wheel hub - Reassembling and Installation

- Apply a smear of grease to the sealing lips of

the radial sealing ring.

- Before re-assembling the hub, repack with

grease F: cavity between inner race and

bearing cage of tapered roller bearings, and

the bearing spaces identified by an ‘x’ on the

drawing.

- To reassemble the hubs, reverse the procedure.

- Tighten nut (8) while rotating the wheel hub.

Torque loading:

MA = 145 Nm

Workshop Manual 7052/56/74-76, 7054/58/77-79

Linkskurve

= 82° +0/-2 Lenkeinschlag

Rechtskurve

Checking the steering angles

The steering angle a must amount to 80° - 82°.

To facilitate the measurement use the complementary

angle b for the setting. It should amount to 98° - 100°.

IMPORTANT: Ensure that the wheel lock is

limited by the stop screws (1) and not by the

cylinder stroke.

Wheel angle stop adjustment

The wheel stop angle is limited by the stop

screws (1).

- By operating on stop screws (1), set both

steering angles to 80° - 82°.

- Check opposite angles.

- Check for adequate clearance between wheels

and truck frame.

- Check that the wheel lock is not limited by

the cylinder stroke.

Steer axle

Workshop Manual 7052/56/74-76, 7054/58/77-79

Steer axle

Stub axle - Removal and Dismantling

1 nut

2 washer

3 king pin

4 plug

5 stub axle

6 hex. hd. screw

7 nut

8 spacing washer

9 wiper ring

10 tapered roller bearing

11 spacer

12 grease nipple

13 tapered roller bearing

14 wiper ring

15 O-Ring

16 spacing washer

- Remove the wheel.

- Press out the pin located between track rod

and stub axle.

- Slacken nut (1).

- Remove washer (2).

- Press the king pin (3) down through the stub

axle and remove the king pin.

- Remove the stub axle from the axle.

- Remove from the stub axle: spacing

washers, ‘O’ ring, wiper rings, tapered roller

bearings and spacer (items 8-16).

Workshop Manual 7052/56/74-76, 7054/58/77-79

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