Stanley Black & Decker MBX138 thru MBX608 user manual Recommended Torque Values

RECOMMENDED TORQUE VALUES

TIE ROD NUT (A)

FLANGE ADAPTER

BOLT (B)

VALVE COVER BOLT (C)

VALVE HOUSING

BOLT (D)

ACCUMULATOR

BOLT (E)

ACCUMULATOR

CAP & PLUG (G)

ACCUMULATOR

COVER BOLT (F)

	Part Name	MBX138	MBX208	MBX258	MBX308	MBX358	MBX408	MBX458	MBX608	APPLY
A	Tie Rod Nut	150 kg-m	250 kg-m	280 kg-m	300 kg-m	330 kg-m	420 kg-m	420 kg-m	470 kg-m	Kopr-
	¹, ²	1085 ft lbs	1808 ft lbs	2025 ft lbs	2170 ft lbs	2387 ft lbs	3038 ft lbs	3038 ft lbs	3400 ftlbs	Kote™
B	Flange					20 kg-m	20 kg-m	20 kg-m	20 kg-m
	Adapter	—	—	—	—
						145 ft lbs	145 ft lbs	145 ft lbs	145 ft lbs
	Bolt ¹
C	Valve Cover	—	—	—	—	35 kg-m	35 kg-m	35 kg-m
	Bolt					253 ft lbs	253 ft lbs	253 ft lbs
D	Valve Hous-	—	—	—	—	50 kg-m	50 kg-m	50 kg-m
	ing Bolt ¹					361 ft lbs	361 ft lbs	361 ft lbs
E	Accumulator	—	—	—	60 kg-m	60 kg-m	60 kg-m	60 kg-m	60 kg-m
	Bolt ¹				434 ft lbs	434 ft lbs	434 ft lbs	434 ft lbs	434 ft lbs
F	Accumulator	—	—	—	30 kg-m	35 kg-m	35 kg-m	35 kg-m	35 kg-m	Loctite™
	Cover Bolt ¹				217 ft lbs	253 ft lbs	253 ft lbs	253 ft lbs	253 ft lbs	242
G	Accumulator	—	—	—	10 kg-m	10 kg-m	10 kg-m	10 kg-m	10 kg-m
	Cap & Plug				72 ft lbs	72 ft lbs	72 ft lbs	72 ft lbs	72 ft lbs

Figure B

Pre Torque Setting

¹ Tighten in a cross pattern	The torque values for TIE RODS NUTS in the above charts are
² Pre-torque to 360 ft. lb./488 Nm	intended to be used with a torque multiplier.

Recommended Tie Rod Torque Procedure

		Figure A
				120°
				150°
	MBX208
	MBX258	MBX358	MBX408	MBX608
MBX138	MBX308		MBX458
120°-130°	110°-120°	160°-170°	170°-180°	170°-180°

The following procedure is the recommended procedure for tie rod torque and may be tightened to the specified torque using the following procedure (see figure A & B).

1.Thread tie rod into lower nut by hand until it bottoms out. Then install the upper tie rod nut and install all the way down until contacts the top of the main accumulator, then hold the upper nut from turning and with a wrench turn just the tie rod until it has a gap as shown in figure B above (0 - 1.5mm / 0 - 0.059 in., top of tie rod flush or just below top of upper tie rod nut).

2.Pre-torque the upper tie rod nuts to 360 ft. lb. / 488 Nm using a cross pattern as shown in the illustration at the left.

3.Using the illustration as a guide, mark a line on each nut and designate it as (A).

4.Using the illustration as a guide, measure the degrees indicated in the chart, for the specific model breaker, from point (A) to point (B) and make a mark near the nut. For example: If working with an MBX208, the degrees listed in figure A for turning the nut to achieve the final torque are listed as 110-120. Make a mark on one point of the nut and designate that point as (A). Measure 110-120 degrees clockwise of point (A) and make a mark next to the nut. Designate that point as (B). Turn the nut clockwise until point (A) and point (B) line up.

5.Continue this procedure in a cross pattern on all 4 nuts.

28 ► MAXFORCE BREAKER User Manual