Tennant 7400, Service Manual

Page: 22 / 322

GENERAL INFORMATION
1-20
7400 MM428 (6--01)
HYDRAULIC FITTING INFORMATION
HYDRAULIC TAPERED PIPE FITTING (NPT)
TORQUE CHART
NOTE: Ratings listed are when using teflon
thread seal.
Size Minimum
Torque
Maximum
Torque
1/4 NPT 10 ft lb (14 Nm) 30 ft lb (41 Nm)
1/2 NPT 25 ft lb (34 Nm) 50 ft lb (68 Nm)
3/4 NPT 50 ft lb (68 Nm) 100 ft lb (136
Nm)
HYDRAULIC TAPERED SEAT FITTING (JIC)
TORQUE CHART
Tibe O.D.
(in)
Thread Size Maximum
Torque
0.25 0.44--20 9 ft lb (12 Nm)
0.38 0.56--18 20 ft lb (27 Nm)
0.50 0.75--16 30 ft lb (41 Nm)
0.62 0.88--14 40 ft lb (54 Nm)
0.75 1.12--12 70 ft lb (95 Nm)
1.0 1.31--12 90 ft lb (122 Nm)
HYDRAULIC O--RING FITTING TORQUE
CHART
Tube
O.D.
(in)
Thread
Size
Minimum
Torque
Maximum
Torque
0.25 0.44--20 6 ft lb (8 Nm) 9 ft lb
(12 Nm)
0.38 0.56--18 13 ft lb
(18 Nm)
20 ft lb
(27 Nm)
*10 ft lb
(14 Nm)
12 ft lb
(16 Nm)
0.50 0.75--16 20 ft lb
(27 Nm)
30 ft lb
(41 Nm)
*21 ft lb
(28 Nm)
24 ft lb
(33 Nm)
0.62 0.88--14 25 ft lb
(34 Nm)
40 ft lb
(54 Nm)
0.75 1.12--12 45 ft lb
(61 Nm)
70 ft lb
(95 Nm)
1.0 1.31--12 60 ft lb
(81 Nm)
90 ft lb
(122 Nm)
NOTE: Do not use sealant on o--ring threads.
*Aluminum bodied components