jost JSK 39, Installation And Operating Instrucitons

6

Servicing and testing

6.1.2 Fifth wheel coupling with central lubrication con-

nection (version Z)

Depending on the conditions in which it is used, the grease spec-

ification and metering, at the latest every 50,000 km or every six

months:

Uncouple the semi-trailer

Clean the fifth wheel coupling and the skid plate.

Check the function of the central lubrication system as de-

scribed in the manufacturer’s instructions.

Lightly grease the fifth wheel coupling plate, locking mecha-

nism parts and king pin with high-pressure grease (EP), JOST

high-performance lubricant (article no. SKE 013 440 000).

Grease the pivot bearing of version D via the holes on the top

part of the plate (see Figure G50/27) with paste-like high-pres-

sure grease (EP), JOST high-performance lubricant (article no.

SKE 013 440 000).

ADVICE!

The pivot bearings on the C and E versions require no

servicing.

6.1.3 Low-maintenance fifth wheel coupling with top

plate liners (version W)

At the latest every 50,000 km or every six months, in harsh condi-

tions every 25,000 km:

Uncouple the semi-trailer

Clean the skid plate and the king pin.

Lightly grease the king pin and the locking mechanism parts

with high-pressure grease (EP), JOST high-performance lubri-

cant (article no. SKE 013 440 000).

Check the top plate liners for signs of wear and damage (see

section 6.6).

ADVICE!

The pivot bearings on the C and E versions require no

servicing.

G50/26

1

In addition, grease the locking

mechanism 

– with a trailer at-

tached –

 every 10,000 km using

the grease nipple (1) on the edge

of the fifth wheel coupling plate.

16

MUB 002 004 M01

 (REV-C)  

04-2019

JSK 36 & JSK 37

JOST IND (REV-A) 06-2019

JSK 39

Trailer rubbing plate guideline- JOST recommendation

Rubbing plate dimension

Length-- 1050mm

Width---  1050mm

Thickness-12mm (2" king pin)

                -14-16mm(3.5" king pin)

Material- ST52-3/Q345D

The skid plate must cover the fifth wheel coupling’s

set-down surface in every position.

Trailer manufacturer must ensure adequate reinforcement

above skid plate.

Rounded or chamfer front and side edges of skid plate.

Maximum 2mm unevenness of skid plate is permissible.

 for complete servicing & routine check-up should

be  schedule in every 10,000 km.

 60,000

30,000