As Required

Checking Driveline Shields

causym CAUTION: Before servicing machine refer to LUBRICATING AND MAINTAINING MACHINE SAFELY at the beginning of this section.

To help prevent bodily injury or death from entanglement in rotating drivelines, replace any missing or damaged shielding. Never operate machine without shielding.

Check driveline shields by making sure they rotate freely. Lubricate or replace if necessary. (See your John Deere dealer.)

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Checking Hitch Pin Torque

1. Check hitch pin lock nuts (A) periodically to be sure they are tight.

2. Tighten to specification.

Specification

Hitch Pin Lock Nut -Torque 350 N·m (258 lb-ft)


A-Lock Nuts

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Freeing Slip Clutch

causym CAUTION: Help prevent bodily injury or death caused by unexpected tractor movement or entanglement in rotating driveline.

  • Disengage PTO.

  • Engage parking brake or place transmission in PARK.

  • Shut off tractor engine and remove key.

IMPORTANT: Friction type clutches will seize if left unused for a period of time, especially in humid or damp conditions. Slip the clutch using the following procedure.

Perform the following steps using the tractor that will operate cutter. (See attaching procedures in Attaching and Detaching section.)

1. Remove two quick lock pins (B) and raise PTO shield (A).


A-PTO Shield
B-Quick Lock Pin (1 each side)

TS1644
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NOTE: Drivelines removed for illustration purposes.

2. Loosen six lock nuts (A) progressively leaving some tension on belleville spring.

3. Place chalk mark (B) across belleville spring and hub.

causym CAUTION: Help prevent personal injury to bystanders from thrown objects. Be sure no one is near the cutter when adjusting.

4. Start tractor and run at low rpm. Check clutch slippage:

a. Engage PTO for 2-3 seconds to slip the clutch.

b. Disengage the PTO.

c. Repeat Steps a and b at least three times.

d. Disengage PTO, shut off tractor engine, remove key and allow components to stop rotating.

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MX5 and MX6

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MX7


A-Lock Nut (6 used)
B-Chalk Marks

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e. Check alignment of chalk marks (E):

If marks are still aligned, clutch DID NOT slip: Disassemble and inspect for wear or damage. (See DISASSEMBLING AND INSPECTING SLIP CLUTCH in Service section.)

If marks are not aligned, clutch has slipped:

IMPORTANT: To avoid driveline damage, DO NOT overtighten lock nuts. A gap must be left between clutch plate (B) and belleville spring (C).

1. Tighten six lock nuts (D) to apply spring pressure to clutch disks.
2. Measure gap (A) between clutch plate (B) and belleville spring (C). If gap is not within specification, evenly adjust six lock nuts until gap is to specification. MX5 and MX6 Clutch Plate-to-Spring
Gap (A) 4 mm (0.157 in.) MX7 Clutch Plate-to-Spring
Gap (A) 3.5 mm (0.138 in.)


causym CAUTION: To help prevent bodily injury or death from entanglement in rotating drivelines, replace all shielding removed and replace any missing or damaged shielding. Never operate machine without shielding.

5. Close and fasten PTO shield.

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MX5 and MX6

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MX7


A-Gap
B-Clutch Plate
C-Belleville Spring
D-Lock Nut (6 used)
E-Chalk Marks

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