Differential plate angle tooth replace

Hello everyone,

vzhledem k damage na bevel gear ze dne rear axle driveMusel jsem replace s bevel a crown gear.
Já noticed s damage through s typical howling noise when changing loads. Running line approx. 160TKm, olej byl changed regularly - proč damage occur Teď...?

Scuffing n vá bevel gear - ne signs ze scuffing n vá ring gear, ale increased roughness ze dne tooth flanks.




Takže jsem delved deeper into s topic again a would like do pass n some information Vám...

V axle drive n vá Daily je hypoid gear, jak je usual with rear-wheel drive vehicles. This means that s axis ze dne bevel gear shaft vá lower than that ze dne ring gear. (positive axis offset)
Advantages - smoother running, higher load capacity vzhledem k larger bevel gear, more teeth jsou engaged v same time, lower position ze dne cardan shaft vá advantageous n cars.

Disadvantage - z důvodu stronger sliding movement ze dne teeth, there jsou higher friction losses (efficiency), higher demands n material a lubricant (& gt; hypoid gear olej)

V toothing n vá IVECO je Klingenberg type, tj tooth backs have a constant width.

Bevel a ring gears jsou always replaced jako pair (they have a pairing number) a jsou only available pro 4x4 from IVECO with ET 7170858, 

https://www.suonama.com.cn/products/differential-plate-angle-tooth-for-iveco-daily-4x4-4x2?_pos=1&_psq=9%2F40&_ss=e&_v=1.0&variant=31613152198769

Bevel & amp; ring gear a measuring dummy


V addition, pokud ji používáte cpl. & amp; want "right" :

- 2x tapered roller bearings bevel gear shaft 42471125 (starý 7162215) original from Timken: HM803110 - inner diameter: - 41,275 mm, outer diameter: 88,900 mm, tot. Width: 30,163 mm
- 2x tapered roller bearing differential/ring gear shaft 1905216 (starý 7164410) Timken original: Y32014X - Inner diameter: 70 mm, outer diameter: 110 mm, tot. Width: 25 mm

- Simmerring n vá flange (12) - má IVECO Et Nr 40101693 (~ 50, -â ';) je from Corteco a since s article Nr 12015770B - dimensions 90mmx60mmx13mm

- velký oříšek na flange - IVECO ET 7162213

- pokud necessary, shims pro bevel gear shaft (2 sets n increments ze 0.025 mm)
- pokud necessary, individual shims n vá ring gear (v increments ze 0.05 mm)

Adjusting/screw ring pro bearing preload ze dne differential housing



a dále special tools:

s dummy bevel gear shaft IVECO ET 99370309 (nebo zkuste instead ze measuring)
Dial gauge with holders
Outside micrometer pro measuring s adjusting discs
Puller (separating knife)
3 / 4 "matice 36mm
friction coefficient nebo Drag torque meter
counterholder pro cardan flange - self-made
tool pro locking s adjusting ring/screw ring - self-made
torque wrench (min.450Nm)
spotting paste


V torque n vá picture je příliš small with 350Nm, I used a larger 1 - 3 / 4 " 80cm do 750Nm.



Jako comparison value, I have/wanted do measure s existing drag torque staré axle drive before disassembling To. However, this byl tak small (approx. 0.3Nm) that To bylo irrelevant pro nové setting. V backlash between s bevel gear a crown gear byl teď také large.



V process -

drain olej na remove, unscrew s cardan shaft v flange, loosen ořech na flange, which není easy with s axle installed, since To je. VERY tight (tightening torque 450Nm). To do this, I blocked s flange with a tool a operated s toggle ze 3 / 4 " socket with a jack.
Remove s cover from s axle housing a unscrew Dva bearing brackets. Unlock s bearing preload adjuster a continue screwing towards s diff do relieve s bearings. Teď diff together with s ring gear should být removed. Ale that didnNe. work because s inner ring ze dne right bearing byl příliš tight na jeho seat. Tak jsem musel drive s bearing, which will být replaced anyway, inwards (left) with a mandrel until there byl enough playTeď could remove Cpl. take ven unit. Ty should není míchat adjusting a shim washers.
V bevel gear shaft může teď also být easily removed, together with s spacer sleeve a small shim. Lever ven Simmerring v flange a drive Vyndejte ty dva. outer rings ze dne tapered roller bearings with a mandrel. Já have a brass pick tak, aby damage anything. V inner bearing ring also má shim a large shim.


When making s settings / measurements, various default values ​​must být achieved

- axial installation position ze dne bevel gear shaft (adjusting washer) & gt; measurement & gt; calculation
- correct preload ze dne bevel gear shaft bearings (adjusting washer) & gt; friction value 1, 2 - 2, 4 Nm
- correct preload ze dne bearings ze dne Diff housing (screw ring) & gt; friction value 2 - 2, 8 Nm
- axial installation position ze dne diff housing / ring gear (adjusting washers)

resulting v backlash from ring gear do bevel gear (0.15 - 0.20 mm) a contact pattern & gt; how/where s teeth touch.

Takže pokud follow s IVECO repair instructions, strength ze dne large shim pro axial alignment ze dne bevel gear shaft vá first determined with s help ze dne dummy bevel gear shaft. Používáš dummy because její bearing surfaces jsou slightly undersized a bearing inner rings může být removed a installed pro measurements without jakékoli problems.
This vá quite tricky, because Ty have do zero s dial gauge na holder base A ty need a VERY flat surface pro this. (exact procedure v guide)


built-in dummy


dial gauge n vá dummy


V current bearing preload (coefficient ze friction) je determined podle installing s dummy shaft a tightening s flange ořech (450Nm) a, pokud necessary, exchanging s small Shim adjusted na desired 1.2 Nm až 2.4 Nm.

Bevel gear shaft shims 

https://www.suonama.com.cn/products/driving-gear-shim-7165064-7165066-7166992-for-iveco-daily?_pos=1&_psq=shim&_ss=e&_v=1.0


Friction measurement



Teď diff může být installed with nový ring gear, nové bearings a starý shims. V bearings jsou preloaded with s screw ring according na guideline a backlash from s bevel gear na crown gear (0.15 mm až 0.20 mm) je determined with s dial gauge. Depending n vá deviation, diff with s ring gear vá removed again a installed with other shims a measured again.


Jestli je to correct, total friction torque může být measured. Here s guide gives n incorrect value od 20 Nm do 28 Nm. That To není možné. since s bearings ze dne bevel gear shaft should have 1.2 Nm & lt; & gt; 2.4 Nm a those ze dne diff 2 Nm & lt; & gt; 2.8 Nm. Jestliže want do measure s total friction torque n vá flangeTy have do take s ratio ze 5.22 into account. Only s friction torque from s diff bearings má effect divided podle 5.22. Takže, pro example, min. 1.2 Nm + (2 Nm: 5.22) = 1.6 Nm (nebo max. 2.4 Nm + (2,8 Nm: 5.22) = 2.9 Nm.

Pokud backlash a coefficient ze friction matchTy should definitely check s contact pattern. That je, jak se teeth roll vypnuto each other. To do this, teeth ze dne ring gear jsou coated with spotting paste. Then s crown wheel vá braked strongly (např. mounting lever between crown wheel a housing) a bevel gear shaft vá turned n vá flange. This results v imprints ze dne bevel gear tooth flanks n vá ring gear tooth flanks. This should být approximately v middle ze dne teeth.





Pokud contact pattern vá correct- Jsi... done ; -) a může secure (caulk) adjusting ring n vá diff a flange Blázne.

Pokud ne, installation position ze dne ring gear nebo bevel gear shaft must být corrected accordingly :-(