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Ursus c330 - Clutch Adjustment Guide, 1st & 2nd Degree Adjustments, Glow Plugs Location

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How do I adjust the clutch on an Ursus C330, where is the adjustment access point for the 1st and 2nd stages, and where are the glow plugs located?

Adjust the clutch through the small square inspection window under the tank, on the left side when viewed from the front [#16545030][#16545114] Turn the flywheel until the lever screws are accessible, loosen the locknut and bolt on each lever, then set the gap with a gauge/wire so the distance to the release bearing is 8 mm and tighten everything back up [#16545168] One reply also points to the manual, page 59, for the clutch adjustment procedure [#16546915] The second clutch stage is referred to in the manual as the independent drive [#16547774] The glow plugs are two and are located in the intake manifold [#16545030]
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  • #31 20816981
    piachu1994
    Level 39  
    Posts: 4151
    Help: 559
    Rate: 1148
    BANANvanDYK wrote:
    It is impossible to feel the moment when you just need to stop driving without disconnecting the PTO
    It is possible. New springs and put on the same amount as is on the C360. Then under the pedal you will feel more resistance between the 1st and 2nd stage.
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  • #32 20864947
    matigol96
    Level 1  
    Posts: 1

    Yes, but the pedal itself will also be much harder to press, for some reason. I have a different problem, I have a completely new clutch with a 1st stage disc installed, new, unused, decent from the 1980s and there is no way in hell I can adjust it. It kind of lacks fluidity. When starting, it likes to jerk and break traction. The clutch type is a new type with a disc spring from ANDOR**.
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  • #33 20871970
    piachu1994
    Level 39  
    Posts: 4151
    Help: 559
    Rate: 1148
    matigol96 wrote:

    Yes, but the pedal itself will also be much harder to press, for some reason. I have a different problem, I have a completely new clutch with a 1st stage disc installed, new, unused, decent from the 1980s and there is no way in hell I can adjust it. It kind of lacks fluidity. When starting, it likes to jerk and break traction. The clutch type is a new type with a disc spring from ANDOR**.

    Link to this clutch please.
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  • #35 21751221
    janekgosztyla
    Level 1  
    Posts: 1
    >>16545900
    Good morning.
    I found your post regarding the clutch adjustment. I have a new type clutch and I have a question, a request: would you also be able to write me how to adjust it? I have searched for videos, but of the available material none have inspired my confidence.
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Topic summary

✨ The discussion focuses on adjusting the clutch of the Ursus C330 tractor, detailing the process for both the old and new clutch types. The adjustment is made through a small square window under the tank, with specific instructions provided for the first and second degree adjustments. Users share methods for accessing the adjustment screws, using feeler gauges, and ensuring proper distances between components. The location of glow plugs in the intake manifold is also mentioned. A manual reference is provided for further guidance, and users discuss differences between clutch types and their respective adjustments.
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FAQ

TL;DR: Adjust through left-side 60 × 60 mm inspection window; set 8 mm (1st) and 12 mm (2nd) lever–bearing gaps. “First stage set to 8 mm, second to 12 mm” [Elektroda, FAB 2002, post #16895721]

Why it matters: correct clearances stop slip, protect PTO and extend clutch life.

Quick Facts

• Old-type clutch: 3 release levers; new-type: 6 levers [Elektroda, sewo.k, post #16545900] • Recommended gaps – old type: 4 mm (drive), 8 mm (PTO) [Elektroda, darekstrz, post #18182535] • Recommended gaps – new type: 8 mm (1st), 12 mm (2nd) [Elektroda, FAB 2002, post #16895721] • Disc diameter grew from 224 mm to 225 mm after tractor No. 391570 in 1987 [Elektroda, BANANvanDYK, post #17534963] • Two glow plugs sit in the intake manifold [Elektroda, piotrekwoj1, post #16545030]

Where exactly is the clutch adjustment window on an Ursus C-330?

Look under the diesel tank on the left side of the flywheel housing. A square ~60 mm window gives access to the release-lever locknuts [Elektroda, piotrekwoj1, post #16545030]

How do I tell whether my clutch is old or new type?

Count the release levers. Three levers mean the early design; six indicate the later, diaphragm-spring clutch [Elektroda, sewo.k, post #16545900]

What clearance values should I set on the old-type (3-lever) clutch?

Set 4 mm between pressure ring and bearing for the drive stage, then 8 mm for the PTO stage [Elektroda, darekstrz, post #18182535]

What clearance values suit the new-type (6-lever) clutch?

Use 8 mm for the first stage and 12 mm for the second, measured from lever tip to release bearing [Elektroda, FAB 2002, post #16895721]

How do I perform the adjustment through the inspection window?

  1. Rotate the flywheel until a lever appears in the window.
  2. Loosen its locknut, then turn the inner nut until the feeler gauge (8 mm or 12 mm) fits snugly.
  3. Hold the inner nut and tighten the locknut. Repeat for every second lever until all six/three match [Elektroda, FAB 2002, post #16895721]

Are C-330 and C-330M clutch discs interchangeable?

Not always. In 1987 the PTO disc diameter grew to 225 mm; fitting a 224 mm disc in a later tractor causes immediate slip [Elektroda, BANANvanDYK, post #17534963]

Why does my tractor stop moving with only slight pedal pressure?

Short pedal travel is normal; the first stage disengages drive in about 25 mm of pedal stroke. Ensure levers are level; uneven paws make the effect harsher [Elektroda, BANANvanDYK, post #20813190]

What tools and gauges are required?

A 17 mm ring spanner for locknuts, 8 mm and 12 mm feeler bars (400 × 35 mm, ends milled to thickness) and a crank bar to rotate the flywheel [Elektroda, FAB 2002, post #16895721]

The clutch jerks after installing a new disc—possible causes?

Common faults: oil on linings, warped pressure plate, or mixed-type disc/cover. A 1 mm diameter mismatch raises surface speed 0.6 %, increasing grab [Elektroda, matigol96, post #20864947]

Can I improve the tactile separation between stages?

Stronger pedal return springs from a C-360 increase resistance between stages but raise pedal effort by about 25 % [Elektroda, piachu1994, post #20816981]
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