8 - Technical Specifications
8. 4
Tightening Hydraulic Fittings
€
DANGER:
Escaping fluid under pressure can penetrate the skin causing serious injury. Relieve pressure
before disconnecting hydraulic or other lines. Tighten all connections before applying pressure. Keep hands
and body away from pin holes and nozzles which eject fluids under high pressure. Use a piece of cardboard
or paper to search for leaks. DO NOT use your hand.
Tightening O-Ring Fittings
Tightening Flare Type Fittings
÷
* Torque values shown are based on lubricated
connections as in reassembly
•
Inspect O-ring and seat for dirt or obvious defects.
•
On angle fittings, back the locknut off until
washer bottoms out at top of groove.
•
Hand tighten fitting until backup washer or
washer face (if straight fitting) bottoms on face
and O-ring is seated.
•
Position angle fittings by unscrewing no more
than one turn.
•
Tighten straight fittings to torque shown.
Threa
d Size
Nut
Size
across
flats
Torque Value *
Turns to
Tighten (After
Finger
Tightening)
(In.)
(In.)
(Nm)
(lb-ft)
(Flats) (Turns)
3/8
1/2
8
6
2
1/3
7/16
9/16
12
9
2
1/3
1/2
5/8
16
12
2
1/3
9/16
11/16
24
18
2
1/3
3/4
7/8
46
34
2
1/3
7/8
1
62
46
1-1/2
1/4
1-1/16
1-1/4
102
75
1
1/6
1-3/16
1-3/8
122
90
1
1/6
1-5/16
1-1/2
142
105
3/4
1/8
1-5/8
1-7/8
190
140
3/4
1/8
1-7/8
2-1/8
217
160
1/2
1/12
÷
* Torque values shown are based on lubricated
connections as in reassembly
•
Check flare and flare seat for defects that might
cause leakage.
•
Align hose end with fitting before tightening.
•
Lubricate connection and hand tighten swivel nut
until snug.
•
To prevent twisting the hose, use two wrenches.
Place one wrench on the hose end body and with
the second wrench, tighten the swivel nut to the
torque shown in this chart.
Threa
d Size
Nut
Size
across
flats
Torque Value *
Turns to
Tighten (After
Finger
Tightening)
(In.)
(In.)
(Nm)
(lb-ft)
(Flats) (Turns)
3/16
7/16
8
6
1
1/6
1/4
9/16
12
9
1
1/6
5/16
5/8
16
12
1
1/6
3/8
11/16
24
18
1
1/6
1/2
7/8
46
34
1
1/6
5/8
1
62
46
1
1/6
3/4
1-1/4
102
75
3/4
1/8
7/8
1-3/8
122
90
3/4
1/8
Summary of Contents for Mercury Covamax series
Page 1: ...MERCURY COVAMAX Operator Instruction Manual 67002404 100 HAU 08 2009 www hardi com au...
Page 10: ...Table of Contents TOC 8...
Page 18: ...2 Safety 2 6...
Page 88: ...6 Maintenance 1 18 Maintenance Activity Record Date Service Performed...
Page 92: ...7 Fault Finding 1 4...
Page 100: ...8 Technical Specifications 8 8...