{"id":6690,"date":"2025-12-16T08:02:34","date_gmt":"2025-12-16T13:02:34","guid":{"rendered":"https:\/\/valleeforestryequipment.ca\/frequently_questions\/cutting-bar-does-not-lower-no-longer-lowers-or-only-partially-lowers\/"},"modified":"2025-12-16T08:46:02","modified_gmt":"2025-12-16T13:46:02","slug":"cutting-bar-does-not-lower-no-longer-lowers-or-only-partially-lowers","status":"publish","type":"frequently_questions","link":"https:\/\/valleeforestryequipment.ca\/en\/frequently_questions\/cutting-bar-does-not-lower-no-longer-lowers-or-only-partially-lowers\/","title":{"rendered":"Cutting bar does not lower \/ no longer lowers or only partially lowers"},"content":{"rendered":"\n<p><strong>Cause<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chain is no longer cutting.<\/li>\n<\/ul>\n\n\n\n<p><strong>Correction<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chain must be replaced or sharpened.<\/li>\n<\/ul>\n\n\n\n<p><strong>Cause<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cutting bar is bent\/warped or burnt.<\/li>\n<\/ul>\n\n\n\n<p><strong>Correction<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Bar must be replaced.<\/li>\n<\/ul>\n\n\n\n<p><strong>Cause<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Lack of air pressure in the pneumatic tank.<\/li>\n<\/ul>\n\n\n\n<p><strong>Correction<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Make sure the gauge returns to 0 when purged and reads 4.6\u20134.8 MPa (68\u201370 psi) during operation.<\/li>\n<\/ul>\n\n\n\n<p><strong>Cause<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Flow control valve on the hydraulic circuit of the cylinder is too closed.<\/li>\n<\/ul>\n\n\n\n<p><strong>Correction<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Adjust the valve by turning the knob: more towards \u201c\u2013\u201d for easier\/faster lowering and towards \u201c+\u201d for slower lowering.<\/li>\n<\/ul>\n\n\n\n<p><strong>Cause<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Relief valve is too tight on the main hydraulic block.<\/li>\n<\/ul>\n\n\n\n<p><strong>Correction<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Unscrew the adjustment of the holding valve until the cutting bar lowers by itself, then tighten it just enough to stop it.<\/li>\n<\/ul>\n\n\n\n<p><strong>Cause<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Squareness is incorrect during the cutting bar descent.<\/li>\n<\/ul>\n\n\n\n<p><strong>Correction<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Adjust the bearings so that the cutting bar descends perpendicular into the wood.<\/li>\n<\/ul>\n","protected":false},"featured_media":0,"template":"","faq-category":[330,344],"class_list":["post-6690","frequently_questions","type-frequently_questions","status-publish","hentry","faq-category-joy30t"],"acf":[],"_links":{"self":[{"href":"https:\/\/valleeforestryequipment.ca\/en\/wp-json\/wp\/v2\/frequently_questions\/6690","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/valleeforestryequipment.ca\/en\/wp-json\/wp\/v2\/frequently_questions"}],"about":[{"href":"https:\/\/valleeforestryequipment.ca\/en\/wp-json\/wp\/v2\/types\/frequently_questions"}],"wp:attachment":[{"href":"https:\/\/valleeforestryequipment.ca\/en\/wp-json\/wp\/v2\/media?parent=6690"}],"wp:term":[{"taxonomy":"faq-category","embeddable":true,"href":"https:\/\/valleeforestryequipment.ca\/en\/wp-json\/wp\/v2\/faq-category?post=6690"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}