Servicing Intervals. Midland Belly/Bottom Dump Trailer 4.6MB, Belly/Bottom Dump Trailer

5.1.3 SERVICING INTERVALS

A standard servicing schedule is provided as a guide for your convenience. In unusual or extreme operating conditions, increase the frequency or perform additional service items to customize this schedule to your application.

Your Midland Gravel Trailer is equipped with Duralon Bushings at performance bushings do not require lubrication or any other maintenance.

The Teflon Fibers woven into the bushing liner provide the lubrication.

bushing liner provide the lubrication.

Fig. 27 PIVOT POINTS (TYPICAL)

1. Fill oiler reservoir.

important oiler information

NOTE: read section 5.2.16 for important oiler information

2. Drain moisture from air tanks (use cables to open drain valves).

Fig. 28 OILER

Clam Shell

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Drain Cable

Fig. 29 DRAIN CABLES (TYPICAL)

8 Hours, Daily or 500 Miles (cont'd)

3. Drain moisture from water filter cannister in air line (1 location at front of trailer).

4. Check tire air pressure. Add as required.

CLAM

Fig. 30 AIR FILTER CANNISTER

Fig. 31 TIRES (TYPICAL)

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Weekly, 10 Days or 5000 Miles

1. Grease slack adjusters.

Refer to Haldex Service manual.

2. Refer to Haldex Brake Systems manual.

3. Grease fifth wheel.

a.

b.

Pivots (2 locations).

Weekly, 10 Days or 5000 Miles (cont'd)

5. Check wheel hub oil levels.

5. Check wheel hub oil levels.

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Fig. 32 HUB OIL LEVEL

Hub

Hub

Weekly, 10 Days or 5000 Miles (cont'd)

6. Retorque the following

fasteners:

a. Oscillating plate bushing anchor bolts to 250 ft. lbs.

Fig. 33 BUSHING ANCHOR BOLTS b. Brake/wheel end system

fasteners.

Refer to Section 5.2.8.

WARNING! Failure to follow this instruction could cause the wheel to come off and cause bodily injury. Failure to back off the nut will cause the bearing to run hot and be damaged.”

Fig. 34 BRAKE/WHEEL END

c. Landing gear bolts torque values (Crank type only).

1/2 in.

5/8 in.

80 ft. lbs.

160 ft. lbs.

Fig. 35 LANDING GEAR MOUNTING BOLTS

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d. Retorque cast spoke wheel rim nuts if so equipped.

Torque (Spoke Wheels)

Table 1 Recommended Wheel Bolt

Torque (Spoke Wheels)

150 - 175

210 - 260

Bolt Size

5/8" - 11

3/4" - 10

150 - 175

IMPORTANT

Do not over-torque fasteners.

Over-torquing can strip threads,

210 - 260 other problems that cause loose fasteners. Use an accurate torque wrench when tightening

IMPORTANT

Do not over-torque fasteners.

Over-torquing can strip threads, collapse spacers or lead to other problems that cause loose fasteners. Use an accurate torque wrench when tightening fasteners.

3 Spoke

3 Spoke

6 Spoke

Torquing Sequence

6 Spoke

Torquing Sequence

5 Spoke

5 Spoke

Wheel (Typical)

Fig. 36 CAST WHEEL RIM NUTS

Wheel (Typical)

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Fig. 37 RIMS

Weekly, 10 Days or 5000 Miles (cont'd)

e. Retorque for stud pilot inner and outer wheel nuts if so equipped.

Table 2 Recommended Wheel

Stud Torque (Disc Wheels)

Stud

Size

Wheel

Type

Ft-lbs

Torque

(Dry)

3/4" - 16

1-1/8" - 16

15/16 - 12

1-5/16 - 12

Disc

Disc

Disc

Disc

450 - 500

450 - 500

750 - 900

750 - 900

Bud

Unimount

10

WHD-8

390 - 440

400 - 600

Inner Schematic (Typical)

f. Retorque hub piloted wheel single nuts if so equipped.

Table 3 Recommended Wheel

Stud Torque

Stud

Size

Ft-lbs

Torque

(Oiled)

450 - 500 M22 x 1.5

(33 mm or 1-1/2 Hex)

M20 x 1.5

(30 mm Hex)

280 - 330

IMPORTANT

Do not over-torque fasteners. Over-torquing can strip threads, collapse spacers or lead to other problems that cause loose fasteners. Use an accurate torque wrench when tightening fasteners.

Outer

Fig. 38 10 STUD WHEEL NUTS (Table 2)

Fastener Schematic

Wheel

Fig. 39 SINGLE NUTS (Table 3)

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Weekly, 10 Days or 5000 Miles (cont'd)

g. Retorque suspension system fasteners

(Refer to charts for torque levels in

Maintenance Section 5.2.1.

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Air

Mechanical

Fig. 40 SUSPENSION SYSTEM U-BOLTS

Weekly, 10 Days or 5000 Miles (cont'd)

h. Retorque push block mounting bolts (if so equipped to 525 lbs.).

10,000 Miles (15,000 km) or Monthly

1. Grease landing gear bearings (3 locations) (crank type only).

Fig. 41 PUSH BLOCK MOUNTING BOLTS

Right Side

Fig. 42 LANDING GEAR

Left Side

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10,000 Miles (15,000 km) or Monthly (cont'd)

2. Retorque fasteners.

a. Landing gear.

Fig. 43 LANDING GEAR

b. Torque mechanical system suspension

(refer to Section 5.2.12.2).

Fig. 44 MECHANICAL SUSPENSION SYSTEM

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25,000 Miles (40,000 km), Quarterly or Every 3 Months

1. Check condition of wheel ends.

Release brakes, jack up the axle and spin the wheel. Check:

a. Wheel bearings.

b. Wobble.

c. Rims and tires.

d. Brake drag.

Fig. 45 WHEEL END

2. Inspect frame and structure

for bends, distortions or

cracks.

a. Oscillating plate and kingpin.

b. Fifth wheel and mounts.

c. Longitudinal and transverse frames.

d. Compartment structure.

e. Discharge gate structure.

f. Suspension system anchorage.

g. Axles.

h. Optional Accessories

i. Side Boards

ii. Tarp

Fig. 46 CLAM TRAILER (TYPICAL)

3. Inspect electrical system

components for:

a. Binding.

b. Rubbing/abrasion.

c. Looseness/dangling.

d. Cracks/tears in harness.

e. Burned out lights.

f. Check that front electrical connector plug anchor female trailer receptical.

Fig. 47 ELECTRICAL (TYPICAL)

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25,000 Miles (40,000 km), Quarterly or

Every 3 Months (cont'd)

4. Inspect air system and

components for:

a. Perform leak-down test.

b. Rubbing/abrading air lines.

c. Cracked hoses.

Fig. 48 AIR SYSTEM (TYPICAL)

5. Clean gladhand screens.

6. Check brake lining thickness.

Replace as required.

Fig. 49 SCREENS

50

Fig. 50 BRAKE LINING

Weekly, 10 Days or 5000 Miles (cont'd)

5. Check wheel hub oil levels.

1. Change oil in hubs.

Fig. 51 HUB OIL (TYPICAL)

Hub

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