Caterpillar Mini excavator E306/E307/E308 Forged Front Idler Group manufacture,supplier in quanzhou China
Product Specifications
The Caterpillar /115-6335/ E307 Forged Front Idler Assembly is a critical undercarriage component for CAT E300-series compact excavators (1.7–2.7 tons). It serves three primary functions:
1. Core Function & Specifications
What is a CAT E307 Forged Front Idler?
A critical undercarriage component that:
Guides and tensions the track chain
Absorbs impacts during operation
Maintains track alignment on CAT E300-series compact excavators (1.7–2.7 tons)
Key Specifications:
| Parameter | Specification |
|---|---|
| Compatibility | CAT E306, E307, E308 models |
| OEM Part # | 115-6335(Forged Idler) |
| Material | Forged carbon steel (superior to cast – 30% higher impact resistance) |
| Weight | 28–32 kg (varies by serial range) |
| Bore Size | 60 mm (standard) |
| Seal Type | Double-lipped labyrinth seals |
✅ Forged vs. Cast Advantage: Forged idlers withstand rock strikes and heavy sideloading – ideal for demolition/rocky terrain.
2. Failure Symptoms & Diagnostics
(Targeting problem-search keywords)
"CAT E307 track derailment": Worn idler flanges or bearing failure.
"Idler wobble/uneven wear": Bent shaft or worn bushings (check with dial indicator).
"Grease leaks from idler": Seal damage (replace immediately to prevent contamination).
"Excessive track sag": Idler tensioning mechanism failure.
3. Replacement Guide
Tools Required:
Track press
36mm socket (idler bolts)
Torque wrench (180–220 N·m for mounting bolts)
Installation Steps:
Release track tension via grease fitting.
Remove master pin and separate track.
Unbolt old idler (4 bolts).
Install new forged idler; align with track frame guides.
Re-tension track to 40–50 mm sag (midway between front/reel).
4. Sourcing: OEM vs. Aftermarket
| Source | Price Range | Lead Time | Warranty |
|---|---|---|---|
| CAT OEM | $850–$1,200 | 2–4 wks | 12 months |
| Berco/ITR | $550–$750 | 1–2 wks | 6–12 mos |
| ESCO/LGMT | $500–$700 | In stock | 6 months |
Top Suppliers:
Caterpillar dealers (financing available)
Undercarriage Specialists: DPW Parts, CQC Track
Marketplaces: www.hangongmachinery.com
5. SEO Keyword Strategy
(Based on commercial/technical search volume)
| Keyword Type | High-Value Examples |
|---|---|
| Commercial Intent | "Buy CAT E307 forged front idler" |
| OEM Part # Focus | "277-8668 idler assembly" |
| Problem Intent | "CAT E307 idler replacement cost" |
| GEO-Targeted | "CAT excavator idler supplier Texas" |
6. Technical Advantages of Forged Idlers
Durability: 2–3x longer lifespan than cast idlers in abrasive conditions.
Impact Resistance: Withstands rock strikes without cracking.
Precision: Tighter tolerances (±0.1mm) for reduced track whip.
Weight Savings: 15% lighter than equivalent cast units.
⚠️ Compatibility Note: Verify machine serial number
7. Preventative Maintenance
Monthly: Check idler flange wear (replace if <15mm thickness).
Every 500 hrs: Inspect seals; repack bearings with EP2 grease.
Avoid: Over-tensioning tracks (causes premature bearing failure).
