Loader Bobcat 853, 853H. Manual - part 80

TORQUE SPECIFICATIONS FOR LOADER (Cont’d)

Specifications (Cont’d)

Item (Cont’d)

Ft.–Lbs.

Nm

Thermostat Housing Bolts

10–17

14–23

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Timing Case Bolts

11–17

15–23

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Timing Case Cover Bolts

11–17

15–23

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Valve Cover Nuts

6–13

8–18

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Water Jacket Tube (Outside)

10–17

14–23

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Water Pump Bolts

11–18

15–24

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Wheel Nuts

105–115

142–156

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

853, 853H Loader

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Service Manual

INCH.

.250

80–90

110–120

LBS.

(9,0–10,2)

(12,4–13,6)

(Nm)

.3125

180–200

215–240

(20,3–22,6)

(24,2–27,1)

.375

25–28

35–40

(34–38)

(47–54)

.4375

40–45

60–65

(54–61)

(81–88)

.500

65–70

90–100

(88–95)

(122–136)

.5625

90–100

125–140

(122–136)

(170–190)

.625

125–140

175–190

(170–190)

(240–260)

FOOT

.750

220–245

300–330

LBS.

(300–330)

(410–450)

(Nm)

.875

330–360

475–525

(450–490)

(645–710)

1.000

475–525

725–800

(645–710)

(985–1085)

1.125

650–720

1050–1175

(880–975)

(1425–1600)

1.250

900–1000

1475–1625

(1200–1360)

(2000–2200)

1.375

1200–1350

2000–2200

(1630–1830)

(2720–2980)

1.500

1500–1650

2600–2850

(2040–2240)

(3530–3870)

1.625

2000–2800

3450–3800

(2720–2980)

(4680–5150)

1.750

2500–2750

4300–4800

(3390–3730)

(5830–6500)

1.875

3150–3500

5500–6100

(4270–4750)

(7450–8300)

2.000

3800–4200

6500–7200

(5150–5700)

(8800–9800)

TORQUE SPECIFICATIONS FOR BOLTS

Torque For General SAE Bolts

The following table shows standard torque specifications for bolts with zinc
phosphate coating. Bolts purchased from Melroe that have zinc phosphate coating
are specified by the letter ‘‘H’’ following the part number.

THREAD

SIZE

SAE GRADE 5

SAE GRADE 8

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853, 853H Loader

Service Manual

Material

Thread Size

(Dia. x Pitch)

Head Mark 4

Head Mark 7

Head Mark 10

M 5 x 0.8

3–4 ft.–lbs.

(4–5 Nm)

M 6 x 1.0

6–7 ft.–lbs.

6–9 ft.–lbs.

(8–9 Nm)

(8–12 Nm)

M 8 x 1.25

6–9 ft.–lbs.

11–16 ft.–lbs.

18–25 ft.–lbs.

(8–12 Nm)

(15–22 Nm)

(24–34 Nm)

M 10 x 1.25

13–18 ft.–lbs.

22–30 ft.–lbs.

36–50 ft.–lbs.

(18–24 Nm)

(30–41 Nm)

(49–68 Nm)

M 12 x 1.25

22–30 ft.–lbs.

40–54 ft.–lbs.

69–87 ft.–lbs.

(30–41 Nm)

(54–73 Nm)

(94–118 Nm)

M 14 x 1.25

36–50 ft.–lbs.

58–80 ft.–lbs.

116–137 ft.–lbs.

(49–68 Nm)

(79–108 Nm)

(157–186 Nm)

TORQUE SPECIFICATIONS FOR BOLTS (Cont’d)

Torque For General Metric Bolts

853, 853H Loader

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Service Manual

A

B–07575

B

A–01852

Nut

Nut

Washer

Washer

O–ring

O–ring

C

TS–01619

1

2

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853, 853H Loader

Service Manual

HYDRAULIC CONNECTION SPECIFICATIONS

O–ring Face Seal Connection

When the fitting is tightened, you can feel when the fitting
is tight to eliminate leakage caused by under or over
torqued fittings. Use vaseline petroleum jelly to hold the
O–ring in position until the fittings are assembled [A].

Straight Thread O–ring Fitting

Lubricate the O–ring before installing the fitting. Loosen the
jam nut and install the fitting. Tighten the jam nut until the
washer is tight against the surface [B].

Tubelines And Hoses

Replace any tubelines that are bent or flattened. They will
restrict flow, which will slow hydraulic action and cause
heat.

Replace hoses which show signs of wear, damage or
weather cracked rubber.

Always use two wrenches when loosening and tightening
hose or tubeline fittings.

Flare Fitting

Use the following procedure to tighten the flare fitting:

Tighten the nut until it makes contact with the seat. Make
a mark across the flats of both the male and female parts
of the connection (Item 1) [C].

Use the chart below to find the correct tightness needed
(Item 2) [C]. If the fitting leaks after tightening, disconnect
it and inspect the seat area for damage.

When repairing hydrostatic and hydraulic
systems, clean the work area before
disassembly and keep all parts clean. Always
use caps and plugs on hoses, tubelines and
ports to keep dirt out. Dirt can quickly damage
the system.

I–2003–0888