Parker HLR070, Mounting Instructions

Page: 46 / 56

Maintenance and service HLR Mounting Instruction
46
192-510201N1 HLR 2019-04

Please check toothed belt tension in the center of the free belt length. If the
toothed belt tension is below the permissible operating tension, the toothed belt
must be tensioned to the "standard belt tension when retensioning". (please refer
to Table 14). Toothed belt tension may not exceed "Standard belt pre-tension of
new belts”. In this case the toothed belt tension must be reduced.

Depending on toothed belt tensions, carefully screw-in resp. screw-out the
tension screw in the carriage (Figure 14, Pos 4).
Take care when loosening or screwing in the round-head screws. Make sure that
the tool is axial to the screw and engages completely in the hexagon socket to
prevent damage to the screw head.
One of the clamping screws is turned to the stop at the factory (Figure 14, detail
view B). This is indicated by the fact that this clamping screw is screwed in
deeper and cannot be screwed in any further. To increase the toothed belt
tension, the other tensioning screw (Figure 14, detail view A) must be screwed in.
To reduce toothed belt tension, both tensioning screws can be released.
The belt tensioning elements (Figure 14, Pos. 3) must not protrude more than 5
mm on both sides, otherwise the steel belt deflections cannot be fitted.

After each adjustment of the clamping screw, move the carriage forwards and
backwards once over approx. the carriage length.
When moving the carriage during tensioning, make sure that the free, measured
belt length matches the value in the gauge. Tip: Mark the position of the carriage
on the profile and always move it to this position for the measurement.

Then measure the toothed belt tension in the center of the free belt length.

Repeat the three steps described above until the required toothed belt tension is
reached.

If both tensioning screws are screwed in at the stop (as shown in Figure 14, detail
view B) and the required toothed belt tension has not yet been achieved, the
toothed belt (Figure 14, Pos 2) must be shortened by one tooth.

Loosen one of the tension screws completely (see Figure 14, Pos. 4).

Carefully pull the toothed belt with the belt tensioning element (Figure 14, Pos. 3)
out of the carriage (depending on the design, the belt tensioning element is
one-piece or two-piece).

Shorten the toothed belt for one tooth. Cut off the toothed belt exactly in the tooth
base.

Insert again the boothed belt (Figure 14, Pos. 2) with the belt tensioning element
(Figure 14, Pos. 3) into the carriage.
The toothed belt must fit into all teeth of the belt tensioning element.

Screw-in tensioning screw (Figure 14, Pos. 4) until the toothed belt tightens.

Measure the toothed belt tension as described above and adjust the tension
screw accordingly until the required toothed belt tension is achieved.

If the required toothed belt pre-tensions ist set, steel strip cover, steel strip
deflectors and steel strip sliding rods (see page 43) can be reassembled again.
Belt weight per
meter
Operating voltage
Standard belt tension during
retensioning
Standard belt tension of new belt
[g/m] [N] [N] [N]
HLR070 80 550 605 ± 30 690 ± 30
HLR080 117.5 990 1090 ± 50 1240 ± 50
Table 14: toothed belt characteristics