1. Why Relief Valves Matter on CAT 374D & 390F

The CAT 374D relief valve 448-5704, 539-0906, 352-6869, 539-0905, 4485704, 5390906, 3526869, 5390905 is your last defence against over-pressure that can burst 6000 USD hydraulic lines. Growshine International stocks brand-new relief cartridges that meet OEM 448-5704 specs. Install tip: always crack the hydraulic tank cap to release vacuum before unscrewing the old valve—saves you from hot-oil splash.

2. D9R 3408 Hydraulic Oil Cooler Swap in 45 Minutes

Overheating is the #1 killer of 3408 diesels. Replace the clogged hydraulic oil cooler 104-4230, 226-7166, 125-3945, 226-7166, 1044230, 2267166, 1253945, 2267166 every 4000 hrs. Growshine heavy equipment parts team ships the D9R cooler with gaskets & SAE O-rings pre-installed—no guesswork. Torque the 12 flange bolts to 205 Nm in a criss-cross pattern to avoid core warping.

3. Keep C15 C18 C13 Radiators Cool Under 95 °C

Industrial gensets run 24/7—so should your cooling system. Our radiator 391-6404, 250-4452, 250-4453, 283-5481, 3916404, 2504452, 2504453, 2835481 uses vacuum-brazed aluminum cores, 22 % thicker than OEM. Pro tip: back-flush with 2 % citric acid before installing the new C15 radiator; you'll remove scale that reduces heat transfer by 30 %.

4. Quick-Fire Parts Checklist (All OEM Numbers Listed)

Growshine International heavy-duty truck parts shelf ready:

• Oil filter 500-0483, 275-2604, 389-1088, 485-4705, 5000483, 2752604, 3891088, 4854705 for 988K wheel loader
• Hydraulic gear pump 2P-9239, 115-0637, 3P-4855, 2P9239, 1150637, 3P4855 for D7G dozer
• Relief valve 206-3165, 206-3216, 140-0634, 2063165, 2063216, 1400634 for 312C 315C pilot circuit
• Valve 553-5200, 553-5199, 553-5198, 553-5197, 5535200, 5535199, 5535198, 5535197 safety cartridge for 349 excavator
• Valve 188-4174, 572-6219, 488-6751, 1884174, 5726219, 4886751 for 324D 326D2 pressure protection
• Mount plate 3W-2369, 3W2369 for D6R D6T bulldozer valve bank
• Main relief 206-3216, 140-0634, 2063216, 1400634 for 315C 315B 318B
• Pilot relief 352-7228, 171-0060, 369-8295, 3527228, 1710060, 3698295 universal excavator fit
• Overload valve 576-2570, 5762570 for 395 374 excavator hydraulics
• Valve 270-5730, 352-7231, 2705730, 3527231 for 345D E345D main pressure
• Valve 323-7464, 3237464 for 320 320GC 330 336 340
• Valve 352-7116, 310-0390, 352-7113, 310-0393, 3527116, 3100390, 3527113, 3100393 pilot safety
• Valve 316-6212, 3166212 for 307D E307D
• Valve 197-0223, 197-0264, 1970223, 1970264 fluid pressure for 312C 314C 315C 315B
• Valve 116-3600, 250-2508, 1163600, 2502508 for 320C E320C
• Valve 568-3724, 568-3725, 239-8984, 352-7203, 5683724, 5683725, 2398984, 3527203 for 345D 349D
• Valve 255-5661, 352-7122, 255-5662, 352-7123, 2555661, 3527122, 2555662, 3527123 for 320D 336D

5. Real-World Failure & Fix

Equipment: CAT 349D2 L (SN: TFX00345) Symptom: boom drift 38 mm in 5 min, hydraulic temp 102 °C Root Cause: fatigue crack on pilot relief 323-7464 seat, causing 4 bar internal leakage Solution: swap valve with Growshine 323-7464 cartridge, re-set pilot pressure to 32 bar (OEM spec), replace return filter; drift reduced to 6 mm, temp dropped to 85 °C.

6. CAT 3116 3126 C18 Generator Deal

⚡ Flash Sale – CAT 3116 3126 C18 Generator 197-8820 1978820 – 12 % OFF Today Only ⚡

7. Growshine International – Who We Are

Growshine International is your one-stop supplier for heavy equipment parts, heavy-duty truck parts, farm parts, auto parts. We export to 68 countries, keep 8000+ part numbers in stock, and offer 12-month warranty. Visit our multi-language sites: ar-excel.com, ampleresiliencesoft.com, cgsc66.com, cgsc-equip.com, en.xinsheng2024.com.

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