Sumitomo SH330-5 Weak Hydraulics? Main Relief Pressure Test & Adjustment

Sumitomo SH330-5 weak hydraulics? In this video, we look at how the Sumitomo SH330-5, SH330LC-5, SH350HD-5, and SH350LHD-5 workshop manual explains main hydraulic relief pressure testing and adjustment.

This manual-based overview covers:

* Low hydraulic power / slow operation symptoms
* Hydraulic device specifications
* Main relief pressure values
* Pressure measuring ports
* Control valve and relief valve location
* Main pressure measurement procedure
* Swing pressure measurement
* Main relief pressure adjustment
* Pilot pressure reference
* Final performance check

The workshop manual lists key pressure values including 34.3 MPa standard main relief pressure and 37.3 MPa with pressure boost. Correct pressure testing helps diagnose weak boom, arm, bucket, swing, or travel performance before replacing expensive hydraulic parts.

Get the complete Sumitomo SH330-5 / SH350HD-5 Workshop Manual here:
https://heydownloads.com/product/sumitomo-sh330-5-sh330lc-5-sh350hd-5-sh350lhd-5-hydraulic-excavator-service-repair-manual-isuzu-6hk1x-engine-complete-workshop-manual-pdf/

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This video is a manual-based educational overview. Always follow the complete workshop manual, use proper tools, and observe all safety procedures before servicing hydraulic equipment.

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