DRESSTA 32501, Руководство оператора

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MAINTENANCE
SECTION 5
Page 57
DRESSTA TD-15H
UNDERCARRIAGE
Fig. 5.52. Checking Track Tension
1. Track Sag of Lubricated Chain
2. Track Sag for Non-lubricated Chain
5.19.5. ADJUSTING TENSION
The track chains are adjusted by hydraulic pressure. When lubricant is introduced into the front
idler fork through the lubrication fitting, it acts upon the piston within the front idler fork forcing the
front idler fork and front idler forward for track adjustment.
WARNING! To avoid possible injury, always stand to the side of the bleeder plug
when making track adjustment. The pressure in the front idler fork is held by the
bleeder plug and check valve. A loose or improper thread fit of either of these
parts can allow them to be ejected by the pressure of lubricant, causing possible
injury. When relieving track tension, never loosen the bleeder plug and check
valve more than 2 – 2 ½ turns.
1. Remove the bolts and track adjuster cover.
WARNING! Before adding lubricant for track adjustment, be sure the ball check
and relief valves are properly torqued to 61 – 75 [Nm] .
2. To increase track tension, connect a lubricator nozzle to lubrication fitting (3). Determine the
amount of adjustment necessary, and add lubricant to obtain the proper track chain tension. It
is advisable to move the machine forward and backward slightly to be sure the correct tension
has been obtained.
3. To reduce track tension, loosen relief valve (2) ½ to 1 full turn to allow the pressurized lubricant
to escape through the relief passage. If lubricant does not appear, loosen the ball check valve
(located under lubricating fitting (3)) ½ to one full turn to allow the pressurized lubricant to
escape from the second relief passage.
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