Epiroc MB Series User Manual

Safety and operating instructions
48 © Construction Tools GmbH | 3390 5201 01 | 2023-05-15
Original Instructions
7.15 Bolt connections / Tightening torques MB750 E, MB1000 E
The bolt connections of hydraulic breakers are subjected to very high loads.
n
Tighten any loose connections without exceeding the recommended tightening torques.
MB750 E MB1000 E
Connection point Interval Type of span-
ner
Size / Torque
Adapter plate* (fastening screws) A daily Allen key 17mm (0.67in.) / 390Nm
(288ftlbs)
Tensioning bolts** B weekly visual
check
Torque spanner/
power wrench
50mm (1.97in.)
Filling valve »G« (threaded plug) C in case of a re-
pair
socket spanner 
Allen key
22mm (0.87in.) / 130Nm (96ftlbs)
5mm (0.20in.) / 20Nm (15ftlbs)
Ports »P« and »T« D weekly open-ended
wrench
50mm (1.97in.) / 275Nm
(203ftlbs)
Valve (HV) E in case of a re-
pair
Allen key 12mm (0.47in.) / 100Nm (74ftlbs)
Percussion chamber ventilation F in case of a re-
pair
open-ended
wrench
41mm (1.61in.) / 200Nm
(148ftlbs)
AutoControl System G in case of a re-
pair
Allen key - 24mm (0.95in.)
350Nm
(258ftlbs)
* Apply anti-seize compound to the allen screw threads before inserting them.
The contact faces of the screw head and the lock washers must not be lubri-
cated.
**MB750 E The tensioning bolt heads can be seen through the openings in the breaker
box.
1. Pre-tighten the tensioning bolts to 200Nm (148ftlbs) crosswise,
2. retighten 120° (2 hexagons) crosswise,
3. retighten 90° (1.5 hexagons) crosswise
**MB1000 E The tensioning bolt heads can be seen through the openings in the breaker
box.
1. Pre-tighten the tensioning bolts to 200Nm (148ftlbs) crosswise,
2. retighten 120° (2 hexagons) crosswise,
3. retighten 120° (2 hexagons) crosswise

Epiroc MB Series Specifications

General

Brand	Epiroc
Model	MB Series
Category	Industrial Equipment
Language	English