Manual Viking MB 448 TX (page 37 of 496) (All languages)

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Installing the mowing blade

Install the mowing blade with

the curved edges pointing

upwards.

For installation,

25= use a wooden block

(approx. 60 x 60 mm) to

counterhold the

26= mowing blade.

28= Fit the mowing blade

onto the blade mount

and

27= tighten the blade

fastening screw with

29= retaining washer to a

torque of 60 - 65 Nm.

CAUTION

Observe the specified

torque when tightening the

blade fastening screw, as

the secure attachment of

the cutting mechanism

depends upon it.

Replace the retaining

washer (29) each time the

blade is installed.

Additionally secure the

blade fastening screw (27)

with Loctite 243.

• Sharpen blades evenly to

prevent vibration due to

imbalance.

• Check blade for damage

before installing.

The blade must be

replaced if notches or

cracks are identified, if the

blades are worn back by 5

mm, or if the blade is

thinner than 2 mm at any

point (wear limits).

Maintenance interval:

As required (wheel drive

does not engage when the

wheel drive lever is

actuated)

The cable is correctly

adjusted in new units.

The cable may have to be

re-adjusted due to wear of

the clutch or alteration of the

cable length.

Adjusting the drive

cable MB 443T,

MB 448T, MB 448TX

CAUTION

Risk of injury!

If the wheel drive cable is

incorrectly adjusted, the

mower may start to move

unintentionally immediately

when started and this may

result in injury or damage to

the appliance. The

adjustment must be

repeated (if necessary,

contact a specialist dealer;

VIKING recommends

VIKING specialist dealers).

MB 443T, MB 448TX

30= Loosen the lock nut.

31= Loosen adjustment

screw until the correct

adjustment is achieved

31= Secure adjustment

screw with

30= lock nut.

MB 448 T

The adjustment is made

using an

32= adjustment screw

located on the upper

handlebar.

The cable tension is

increased by turning the

adjustment screw in the

"+" direction, turning it

in the "-" direction

reduces the tension.

Correct adjustment:

The driving wheels must lock

after approx. one third of the

lever travel.

Actuate the drive lever while

pulling the lawn mower

backwards.

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Viking MB 448 TX Manual

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