PZ CM 185 / CM 186 Cyclomower service schedule

Mowers · 1980s (manual G8809RST, 1988)

Covers the PZ CM 185 / CM 186 Cyclomower (drum mower).

Every maker's service job for the PZ CM 185 / CM 186 Cyclomower, counted in hours, with the oils, filters and parts each one needs. Add your implement to Farmyard Workshop and it works out what's due from your hours and dates, and keeps the service history.

Track your CM 185 / CM 186 Cyclomower for free

Versions: CM 185; CM 186 (mechanical lift); CM 186 with hydraulic cylinder

Service intervals

Job	When
Safety breakaway and greasing	every 8 hours
Blades and blade holder check	every 10 hours
V-belt tension	every 10 hours
Drum skirts, saucers and transport strips	every year
Gearbox grease level	every year

Service jobs and parts

Safety breakaway and greasing

Frame · every 8 hours

PZ: grease daily in use, including the PTO shaft and the swath disc if fitted, and check the safety breakaway works every day in the season.

Part	Qty	Notes	Part number
Multi-purpose grease	1	Good tacky grease	check your handbook

Step-by-step

Stop the PTO and engine, take the key out and wait until the drums have stopped.
Grease the four nipples, the PTO shaft and the swath disc if fitted.
Check the breakaway pivots back freely. Reset it by stopping and reversing.
If it trips in heavy crop without hitting anything, tighten the spring with nut 8 (CM 186: nut 24).

Tools: Grease gun

Blades and blade holder check

Blades and skids · every 10 hours

PZ: every drum must carry its full set of blades, all new or equally worn, sitting properly over the holder pins. Renew blade holders when the pins are more than half worn. Unbalanced drums vibrate and wreck bearings.

Part	Qty	Notes	Part number
Blade, left drum	3	Genuine PZ	TF 70
Blade, right drum	3	Genuine PZ	TF 71
Blade holder	1	If the pin is more than half worn. Genuine PZ: check your parts book	check your handbook

Step-by-step

Lower the mower, stop the PTO and engine, take the key out and wait until both drums have stopped.
Check every blade. Each has two edges: when one is worn, turn it over on the same drum.
Keep the blades on a drum all new or all equally worn.
Check the blade holder pins. Renew a holder when its pin is more than half worn.
Use the detachment tool to fit or remove blades and make sure each blade sits right over its pin.
Replace damaged or badly worn drums or holders straight away: the drums are balanced at the factory.

Tools: PZ blade detachment tool, Gloves

V-belt tension

Drive · every 10 hours

PZ: tighten the belts when gap X goes over 3 mm. Overtightening damages the gearbox input shaft and main drive bearings.

Part	Qty	Notes	Part number
V-belts	1	If worn. Genuine PZ: check your parts book	check your handbook

Step-by-step

Stop the PTO and engine, take the key out and wait until the drums have stopped.
Measure gap X. If it is over 3 mm, adjust with nuts 9 and 10 until it is about 1 mm.
Do not overtighten.
If the belts still slip at the right tension, slow down.

Tools: Spanners, Feeler gauge or rule

Drum skirts, saucers and transport strips

Blades and skids · every year

PZ: the drum skirts wear where the blade holders bolt on, and the transport strips under the drums must be renewed before wear lets the drum itself be damaged.

Part	Qty	Notes	Part number
Saucer (skid disc)	1	Removed to move the blade holders; genuine PZ	TT 20
Blade holder nut	1	Use original nuts when moving holders	ND 2083
Transport strip	2	Per drum	TT 66
Transport strip bolt	1	Original bolts only	ND 1013

Step-by-step

Stop the PTO and engine, take the key out and wait until the drums have stopped. Prop the mower securely before working underneath.
Check the drum skirts where the blade holders fix. If wear is heavy, take off the saucers (TT 20) and move the blade holders round so the blades meet unworn metal. Use original nuts ND 2083.
Check the two transport strips (TT 66) on each drum. Renew them before wear reaches the drum. A strip can be reused on the opposite drum. Fit with original bolts ND 1013.
Check the saucers for wear and cracks.
Check the cutting head lid bolts are tight so the frame stays rigid.

Tools: Spanners, Torque wrench, Gloves

Gearbox grease level

Gearbox · every year

The CM 185/186 gearbox runs in PZ Cyclo EP-O semi-fluid grease, not oil, and needs no routine change. Only top up if needed.

Part	Qty	Notes	Part number
Grade 0 EP grease	1	NLGI 0 EP grease. PZ Cyclo EP-O or equivalent, top-up only. Aztec Oils match: VOLCATEC LITHIUM EP 0	check your handbook

Step-by-step

Stop the PTO and engine, take the key out and wait until the drums have stopped. Stand the mower level.
Open the gearbox check point and look at the grease level. It should reach the bottom of the horizontal shaft.
Top up with PZ Cyclo EP-O or an equivalent grade 0 EP grease only if low.
Do not use ordinary oil or thick grease.

Tools: Spanners, Clean scoop or grease pump

Oils, fluids and capacities

System	Oil or spec	Capacity
Gearbox	PZ Cyclo EP-O grease, or an equivalent grade 0 EP grease. Factory filled; no routine change	Level to the bottom of the horizontal shaft (6 kg)
Grease points and PTO shaft	Good tacky multi-purpose grease	4 nipples plus the PTO shaft

Specifications


Cutting width	185 cm
Drums and blades	2 drums, 3 blades each (6)
PTO speed	540 rpm, PTO shaft with freewheel
Hitch	Cat. I and II
Weight	CM 185: ≈425 kg; CM 186: 460 kg (mechanical), 470 kg (hydraulic)
Blades	PZ TF 70 left drum, TF 71 right drum
V-belt adjustment	Tighten when gap X is over 3 mm; set to about 1 mm
Bolt torques	PZ table, grade 8.8: M8 24 Nm, M10 48 Nm, M12 85 Nm, M16 210 Nm; add 10% for lock nuts or lock bolts

Known problems

Unequal blades

Mixing new and worn blades on one drum unbalances it. Keep each drum's set the same.

Never tilt it back

PZ says run the mower level or slightly forward. Tilted back it recuts the stubble and wears the saucers.

Overtight belts

Overtightening the belts damages the gearbox and drive bearings.

Repair guides

Blades and blade holders: turning, changing and moving holders (Easy, 30 minutes to 2 hours): Poor cut, blades worn or missing, blade holder pins worn, or drum skirts worn where the holders bolt on.
Drum vibration or change in sound: balance and transport strips (Moderate, 1–2 hours): Abnormal vibration or a change in the sound of the drums, the cutting head lid loose, or the transport strips under the drums worn.
Safety breakaway tripping and V-belts slipping (Easy, 30 minutes): The mower swings back in heavy crop without hitting anything, the breakaway does not reset, or the belts slip.

The full step-by-step guides are in Farmyard Workshop once you add your implement.

Parts list with genuine part numbers

Wear parts per Sparex model/OEM lists, PZ CM 185 / CM 186

Wear parts

Part	Part number	Qty	Notes
Mower blade RH, twisted, 94 x 48 x 3 mm, hole 19 mm	Z1000020	per RH blade	Wear part. Genuine Kuhn number (PZ is now Kuhn) per Sparex OEM list for S.77113; Sparex suitable-for names PZ CM185 and CM185H. PZ code TF70
Mower blade LH, twisted, 94 x 48 x 3 mm, hole 19 mm	Z1000010	per LH blade	Wear part. Genuine Kuhn number per Sparex OEM list for S.77114; Sparex suitable-for names PZ CM185 and CM185H. PZ code TF71

Sources

Open Farmyard Workshop