# Maintenance And Service - Bosch GOL 20 D Instructions

Also See for GOL 20 D:

OBJ_BUCH-1239-004.book Page 11 Thursday, January 21, 2016 11:45 AM
Checking the Crosshair
A measuring distance of approx. 30 m is required for the
check. Set up the measuring tool in the centre and levelling
rods A and B at both ends of the measuring distance.
30 m
a
1
A
a
– b
= d
1
1
After aligning and focussing the measuring tool, read the
heights at both levelling rods. Calculate the difference d be-
tween the height a
of levelling rod A and the height b
1
elling rod B.
Example:
a
= 1.937 m
1
b
= 1.689 m
1
a
– b
= 1.937 m – 1.689 m = 0.248 m = d
1
1
a
2
A
a
– d = b
1 m
2
Set up the measuring tool approx. 1 m away from levelling rod
A. After aligning and focussing the measuring tool, read the
height a
at levelling rod A.
2
Subtract the previously calculated value d from the measured
height a
in order to receive the set value for the height b
2
levelling rod B.
Measure height b
at levelling rod B. When the measured val-
2
ue deviates by more than 6 mm (GOL 20 D/G), 3 mm
(GOL 26 D/G) or 2 mm (GOL 32 D/G) from the calculated set
value, the crosshair must be readjusted.
Example:
a
= 1.724 m
2
d = 0.248 m
a
– d = 1.724 m – 0.248 m = 1.476 m
2
GOL 20 D/G: When measuring, height b
±6 mm.
GOL 26 D/G: When measuring, height b
±3 mm.
GOL 32 D/G: When measuring, height b
±2 mm.
Bosch Power Tools
b
1
d
Unscrew the eyepiece cover 4. Using the adjusting pin 18,
B
turn adjusting screw 5 clockwise or anticlockwise, until the
calculated set value for height b
on levelling rod B.
Screw on eyepiece cover 4 again.
of lev-
1
Example:
When measuring b
Check the crosshair again. If required, repeat the procedure
or refer to an authorised Bosch after-sales service.

## Maintenance and Service

Maintenance and Cleaning
Store and transport the measuring tool only in the supplied
b
2
case.
Keep the measuring tool clean at all times.
Do not immerse the measuring tool in water or other fluids.
d
Wipe off debris using a moist and soft cloth. Do not use any
B
cleaning agents or solvents.
2
Handle the lenses with particular attention. Remove dust only
with a soft brush. Do not touch the lenses with your fingers.
Before storing, allow the measuring tool and the case to dry
completely. A bag of silica gel dryer for the removal of residual
moisture is included in the case. Renew the bag of silica gel
at
2
dryer regularly.
For repairs, only send in the measuring tool in the case.
After-sales Service and Application Service
Our after-sales service responds to your questions concern-
ing maintenance and repair of your product as well as spare
parts. Exploded views and information on spare parts can al-
so be found under:
www.bosch-pt.com
must be 1.476 m
concerning our products and their accessories.
2
In all correspondence and spare parts orders, please always
must be 1.476 m
2
include the 10-digit article number given on the nameplate of
the product.
must be 1.476 m
2
English | 11
18
5
is reached when measuring
2
, the value 1.476 m must be set.
2
1 609 92A 260 | (21.1.16)